fzus61 kbuf 220802
glflo 
expires:202607221500;;398025

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt wed jul 22 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a 30.2 inch high will build across the region through friday. the 
high will move off the east coast saturday. a 29.7 inch low will 
approach from the northwest through sunday.


loz063>065-221500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt wed jul 22 2026

.today...west winds to 30 knots. a chance of showers this
morning. waves 5 to 9 feet. waves occasionally around 11 feet. 
.tonight...west winds 15 to 25 knots diminishing to 5 to
10 knots. waves 5 to 8 feet subsiding to 1 to 2 feet. waves
occasionally around 10 feet. 
.thursday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.thursday night...west winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.friday...south winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...south winds 5 to 15 knots. waves 2 feet or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers.
waves 2 feet or less. 

$$

fzus61 kbuf 220802
glflo 
expires:202607221500;;398024

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt wed jul 22 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a 30.2 inch high will build across the region through friday. the 
high will move off the east coast saturday. a 29.7 inch low will 
approach from the northwest through sunday.


loz062-221500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt wed jul 22 2026

.today...west winds 15 to 25 knots. waves 4 to 7 feet subsiding
to 3 to 6 feet. waves occasionally around 9 feet. 
.tonight...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...west winds 5 to 10 knots becoming southwest. waves
1 to 2 feet. 
.thursday night...southwest winds 10 knots or less. waves 1 foot
or less. 
.friday...south winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots becoming west. a chance
of showers. waves 2 feet or less. 

$$

fzus61 kcle 220750
glfle 
expires:202607221430;;397643

open lake forecast for lake erie
national weather service cleveland oh
350 am edt wed jul 22 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a trough averaging 29.90 inches will linger over the lower great
lakes through this evening before high pressure 30.20 inches
builds east over the region early thursday. the high will maintain
influence through friday night and drift east on saturday. a 
trough averaging 29.90 inches will move east across lake erie late
saturday into sunday.


lez061-168-169-221430-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
350 am edt wed jul 22 2026

.today...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a slight chance of waterspouts. a slight chance of
showers. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tonight...northwest winds 5 to 15 knots. a slight chance of
waterspouts early. a slight chance of showers early. waves 1 to
3 feet. 
.thursday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.thursday night...southwest winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...southeast winds 10 knots or less. waves 1 foot or less.
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 10 to 15 knots. a chance of showers
during the day, then a chance of showers and thunderstorms sunday
night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 220750
glfle 
expires:202607221430;;397641

open lake forecast for lake erie
national weather service cleveland oh
350 am edt wed jul 22 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a trough averaging 29.90 inches will linger over the lower great
lakes through this evening before high pressure 30.20 inches
builds east over the region early thursday. the high will maintain
influence through friday night and drift east on saturday. a 
trough averaging 29.90 inches will move east across lake erie late
saturday into sunday.


lez162-163-221430-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
350 am edt wed jul 22 2026

.today...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.tonight...northwest winds 5 to 10 knots becoming north. a slight
chance of waterspouts late. a slight chance of showers late.
waves 1 foot or less. 
.thursday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.thursday night...southeast winds less than 10 knots becoming
south. waves 1 foot or less. 
.friday...light and variable winds. waves 1 foot or less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.sunday...west winds around 10 knots becoming southwest. a chance
of showers and thunderstorms sunday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 220750
glfle 
expires:202607221430;;397642

open lake forecast for lake erie
national weather service cleveland oh
350 am edt wed jul 22 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a trough averaging 29.90 inches will linger over the lower great
lakes through this evening before high pressure 30.20 inches
builds east over the region early thursday. the high will maintain
influence through friday night and drift east on saturday. a 
trough averaging 29.90 inches will move east across lake erie late
saturday into sunday.


lez164>167-221430-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
350 am edt wed jul 22 2026

.today...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a slight chance of waterspouts early this afternoon. a
slight chance of showers early this afternoon. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots becoming north. a slight
chance of waterspouts late. a slight chance of showers late.
waves 1 to 3 feet. 
.thursday...north winds 10 knots or less. waves 1 foot or less. 
.thursday night...east winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...east winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 2 feet or less. 
.sunday...southwest winds 10 to 15 knots. a chance of showers
during the day, then a chance of showers and thunderstorms sunday
night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 220801
glflh 
expires:202607221615;;397857

open lake forecast for lake huron
national weather service detroit/pontiac mi
401 am edt wed jul 22 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lhz362-363-221615-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
401 am edt wed jul 22 2026

.today...northwest winds 20 to 25 knots with gusts to around
30 knots. waves 8 to 12 feet. waves occasionally around 15 feet. 
.tonight...northwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots after midnight. waves 4 to
6 feet. 
.thursday...west winds 5 to 10 knots backing to the south early
in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and afternoon. waves occasionally around 8 feet.
.thursday night...south winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots becoming southeast 10 to
15 knots late in the afternoon. waves 1 to 3 feet building to
2 to 4 feet late in the afternoon. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots until early evening...then decreasing to 5 to 10 knots
by midnight. a chance of showers by midnight. waves 1 to 3 feet
building to 2 to 4 feet . 
.sunday...southwest winds 5 to 10 knots. a chance of showers
early in the morning. a chance of showers . waves 1 to 3 feet. 


$$

fzus63 kdtx 220801
glflh 
expires:202607221615;;397858

open lake forecast for lake huron
national weather service detroit/pontiac mi
401 am edt wed jul 22 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lhz462>464-221615-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
401 am edt wed jul 22 2026

.today...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.tonight...northwest winds 10 to 15 knots decreasing to 5 to
10 knots early in the morning. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.thursday...northwest winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.thursday night...south winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots backing to the southeast
late in the afternoon. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots by midnight. a chance of showers by midnight. waves
2 feet or less. 
.sunday...southwest winds 5 to 10 knots becoming south 10 to
15 knots . a chance of showers early in the morning...then a
chance of showers and thunderstorms. waves 1 to 3 feet. 


$$

fzus63 kdtx 220801
glfsc 
expires:202607221615;;397873

lake st clair forecast
national weather service detroit/pontiac mi
401 am edt wed jul 22 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lcz460-221615-
lake st clair-
401 am edt wed jul 22 2026

.today...northwest winds 15 to 20 knots diminishing to 10 to 15
knots in the afternoon. mostly sunny. waves 1 to 3 feet.
.tonight...north winds 10 to 15 knots diminishing to 5 to 10 knots
in the late evening and overnight. mostly clear. waves 2 feet or
less.
.thursday...north winds 5 to 10 knots early in the morning becoming
light and variable...then becoming east 5 to 10 knots early in the
afternoon. sunny. waves 2 feet or less.
.thursday night...southeast winds 5 to 10 knots becoming light and
variable. clear. waves 2 feet or less.
.friday...light and variable winds becoming southeast 5 to 10 knots
in the afternoon and evening. mostly sunny in the morning becoming
clear. waves 2 feet or less.
.saturday...south winds 10 to 15 knots. clear. waves 2 feet or less.
.sunday...southwest winds 10 to 15 knots. mostly clear. a chance of
showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 220801
glflh 
expires:202607221615;;397856

open lake forecast for lake huron
national weather service detroit/pontiac mi
401 am edt wed jul 22 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lhz361-221615-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
401 am edt wed jul 22 2026

.today...northwest winds 20 to 25 knots decreasing to 15 to
20 knots late in the afternoon. gusts to 30 knots. waves 6 to 9 
feet. waves occasionally around 12 feet. 
.tonight...northwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots in the late evening and
overnight. waves 3 to 5 feet subsiding to 2 to 4 feet early in
the morning. 
.thursday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.thursday night...southwest winds 5 to 10 knots. waves 1 to
3 feet. 
.friday...southwest winds 10 to 15 knots becoming south 5 to
10 knots late in the morning...then backing to the southeast late
in the afternoon. waves 1 to 3 feet building to 2 to 4 feet late
in the afternoon. 
.saturday...south winds 10 to 15 knots decreasing to 5 to
10 knots early in the evening...then veering to the southwest by
midnight. a chance of showers . waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and early afternoon...then increasing to
10 to 15 knots . a chance of showers early in the morning. a
chance of showers by midnight. waves 1 to 3 feet. 


$$

fzus63 kmkx 220800
glflm 
expires:202607221515;;397811

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cdt wed jul 22 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

gusty north winds early this morning will remain through much of
the predawn hours before steadily subsiding after sunrise. high 
pressure around 30.1 inches will build into the northern 
mississippi river valley from the great plain today. the high will
cross southern lake michigan thursday morning, progressing into 
the northeastern united states thursday night into friday. 
progression of the high will result in a south to southwest wind 
shift across the waters.

29.5 inch low pressure will move quickly from the canadian great 
plains toward quebec friday through saturday, maintaining south to
southwest winds over lake michigan. the low will attempt to pull 
a cold front into the western great lakes by sunday, with the 
boundary slowly advancing south across the waters through monday. 
the approaching/passing front will result in returning 
thunderstorm chances saturday night through monday, in addition to
a northerly wind shift by monday afternoon.


lmz261-362-364-366-563-565-567-868-221515-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
300 am cdt wed jul 22 2026

sheboygan wi to pentwater mi north...

.today...northwest winds to 30 kt. waves 4 to 7 ft occasionally
to 9 ft subsiding to 3 to 5 ft. 
.tonight...northwest winds 15 to 25 kt becoming west 10 to 15 kt.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...west winds 10 to 15 kt increasing to 10 to 20 kt late
in the morning, then becoming southwest 15 to 25 kt early in the
afternoon becoming south late. waves 1 to 3 ft. 
.thursday night...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.friday night...south winds 15 to 25 kt becoming southwest. waves
4 to 6 ft occasionally to 8 ft. 
.saturday...southwest winds to 30 kt becoming south. chance of
showers. waves 4 to 7 ft occasionally to 9 ft. 
.sunday...west winds 10 to 20 kt becoming southwest 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 220800
glflm 
expires:202607221515;;397812

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cdt wed jul 22 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

gusty north winds early this morning will remain through much of
the predawn hours before steadily subsiding after sunrise. high 
pressure around 30.1 inches will build into the northern 
mississippi river valley from the great plain today. the high will
cross southern lake michigan thursday morning, progressing into 
the northeastern united states thursday night into friday. 
progression of the high will result in a south to southwest wind 
shift across the waters.

29.5 inch low pressure will move quickly from the canadian great 
plains toward quebec friday through saturday, maintaining south to
southwest winds over lake michigan. the low will attempt to pull 
a cold front into the western great lakes by sunday, with the 
boundary slowly advancing south across the waters through monday. 
the approaching/passing front will result in returning 
thunderstorm chances saturday night through monday, in addition to
a northerly wind shift by monday afternoon.


lmz080-669-671-673-675-777-779-870-872-874-876-878-221515-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
300 am cdt wed jul 22 2026

sheboygan wi to pentwater mi south...

.today...north winds 15 to 25 kt. waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tonight...north winds 10 to 20 kt becoming northwest 10 to 15 kt
late in the evening, then diminishing to 5 to 10 kt after
midnight increasing to 10 to 15 kt late. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.thursday...west winds 5 to 10 kt becoming southwest late in the
morning, then becoming southwest 10 to 15 kt early in the
afternoon becoming south 10 to 20 kt late. waves 1 to 3 ft. 
.thursday night...south winds 10 to 20 kt becoming southwest.
waves 2 to 4 ft. 
.friday...southwest winds 10 to 15 kt becoming south 15 to 25 kt
in the afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
3 to 5 ft. 
.saturday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 3 to 5 ft. 
.sunday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmqt 220801
glfls 
expires:202607222000;;397866

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed jul 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

heights continue to rise over the lake this morning before becoming 
maximized at 30.1 inches over the western lake by around noon edt. 
afterwards, the high flattens and moves east towards new england the 
rest of today into early friday morning. while ridging of around 
30.0 inches looks to remain over lake superior on thursday, a weak 
29.9 to 30.0 inch low could move over the northwestern half of the 
lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.6 inch low moving in from the 
west moves over the upper great lakes by monday morning. 




lsz162-222000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt wed jul 22 2026 /300 am cdt wed jul 22 2026/

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then becoming southwest 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.thursday night...southwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.friday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. showers likely and a chance of
thunderstorms after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...southwest winds 15 to 25 knots becoming northeast
5 to 15 knots. waves subsiding to calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 

$$

fzus63 kmqt 220801
glfls 
expires:202607222000;;397869

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed jul 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

heights continue to rise over the lake this morning before becoming 
maximized at 30.1 inches over the western lake by around noon edt. 
afterwards, the high flattens and moves east towards new england the 
rest of today into early friday morning. while ridging of around 
30.0 inches looks to remain over lake superior on thursday, a weak 
29.9 to 30.0 inch low could move over the northwestern half of the 
lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.6 inch low moving in from the 
west moves over the upper great lakes by monday morning. 




lsz265-222000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt wed jul 22 2026

.early this morning...northwest winds 15 to 25 knots. waves 2 to
4 feet. 
.today...northwest winds 15 to 25 knots becoming west 10 to
20 knots late. waves subsiding to calm to 2 feet. 
.tonight...west winds 10 to 20 knots increasing to 15 to 25 knots
after midnight. waves building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots becoming southwest 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. a chance of showers after
midnight. waves building to 2 to 4 feet. 
.saturday...southwest winds 10 to 20 knots veering north. a
chance of showers. waves subsiding to calm to 2 feet. 
.sunday...east winds 10 to 20 knots veering southeast. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 220801
glfls 
expires:202607222000;;397870

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed jul 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

heights continue to rise over the lake this morning before becoming 
maximized at 30.1 inches over the western lake by around noon edt. 
afterwards, the high flattens and moves east towards new england the 
rest of today into early friday morning. while ridging of around 
30.0 inches looks to remain over lake superior on thursday, a weak 
29.9 to 30.0 inch low could move over the northwestern half of the 
lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.6 inch low moving in from the 
west moves over the upper great lakes by monday morning. 




lsz266-222000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 am edt wed jul 22 2026

.early this morning...northwest winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...northwest winds 15 to 25 knots backing west late. waves
subsiding to 2 to 4 feet. 
.tonight...west winds 10 to 20 knots increasing to 15 to 25 knots
late. waves subsiding to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots backing southwest in the
afternoon. waves building to 2 to 4 feet. 
.thursday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a slight chance of showers and
thunderstorms after midnight. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...southwest winds 10 to 20 knots becoming north 5 to
15 knots. showers. a chance of thunderstorms. waves subsiding to
calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 220801
glfls 
expires:202607222000;;397871

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed jul 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

heights continue to rise over the lake this morning before becoming 
maximized at 30.1 inches over the western lake by around noon edt. 
afterwards, the high flattens and moves east towards new england the 
rest of today into early friday morning. while ridging of around 
30.0 inches looks to remain over lake superior on thursday, a weak 
29.9 to 30.0 inch low could move over the northwestern half of the 
lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.6 inch low moving in from the 
west moves over the upper great lakes by monday morning. 




lsz267-222000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt wed jul 22 2026

.early this morning...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...northwest winds 15 to 25 knots backing west late. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. a slight chance of showers after
midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.saturday...southwest winds 10 to 20 knots veering northwest.
showers. a chance of showers. waves subsiding to calm to 2 feet. 
.sunday...north winds 10 to 20 knots becoming southeast 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 220801
glfls 
expires:202607222000;;397867

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed jul 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

heights continue to rise over the lake this morning before becoming 
maximized at 30.1 inches over the western lake by around noon edt. 
afterwards, the high flattens and moves east towards new england the 
rest of today into early friday morning. while ridging of around 
30.0 inches looks to remain over lake superior on thursday, a weak 
29.9 to 30.0 inch low could move over the northwestern half of the 
lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.6 inch low moving in from the 
west moves over the upper great lakes by monday morning. 




lsz263-222000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 am edt wed jul 22 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots backing west in the
afternoon, then becoming southwest 10 to 20 knots late. waves
building to 2 to 4 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then increasing to 10 to 20 knots late.
waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a slight chance of thunderstorms
through midnight. a slight chance of showers. waves subsiding to
1 to 3 feet, then building to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. showers likely and a chance of thunderstorms
after midnight. waves building to 4 to 7 feet occasionally to
9 feet. 
.saturday...southwest winds 20 to 30 knots becoming northeast
5 to 15 knots. a chance of showers. waves subsiding to calm to
2 feet. 
.sunday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 220801
glfls 
expires:202607222000;;397868

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed jul 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

heights continue to rise over the lake this morning before becoming 
maximized at 30.1 inches over the western lake by around noon edt. 
afterwards, the high flattens and moves east towards new england the 
rest of today into early friday morning. while ridging of around 
30.0 inches looks to remain over lake superior on thursday, a weak 
29.9 to 30.0 inch low could move over the northwestern half of the 
lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.6 inch low moving in from the 
west moves over the upper great lakes by monday morning. 




lsz264-222000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt wed jul 22 2026

.early this morning...northwest winds 10 to 20 knots. waves 1 to
3 feet. 
.today...northwest winds 5 to 15 knots backing west in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots. a slight chance
of thunderstorms through midnight. a slight chance of showers.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. showers likely and a chance of thunderstorms
after midnight. waves building to 4 to 7 feet occasionally to
9 feet. 
.saturday...southwest winds 15 to 25 knots becoming northeast
5 to 15 knots. a chance of showers. waves subsiding to calm to
2 feet. 
.sunday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$