fzus61 kbuf 250803
glflo 
expires:202605251500;;612209

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon may 25 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 30.1 inch high will settle across the region through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday morning. a 30.2 
inch surface high pressure over canada will start to expand south 
over the lake on thursday into friday.


loz063>065-251500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon may 25 2026

.today...southwest winds 5 to 15 knots becoming west. a chance of
showers early. areas of fog this morning. waves 2 feet or less. 
.tonight...west winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.tuesday...southwest winds 5 to 15 knots. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west.
waves 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming north. waves 1 to
3 feet. 
.thursday...north winds 5 to 15 knots becoming west. waves 2 feet
or less. 
.friday...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet. 

$$

fzus61 kbuf 250803
glflo 
expires:202605251500;;612208

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon may 25 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 30.1 inch high will settle across the region through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday morning. a 30.2 
inch surface high pressure over canada will start to expand south 
over the lake on thursday into friday.


loz062-251500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon may 25 2026

.today...west winds 5 to 10 knots becoming southwest. patchy fog
early. waves 1 foot or less. 
.tonight...southwest winds 5 to 10 knots. waves 1 foot or less. 
.tuesday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.tuesday night...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming north. waves
2 feet or less. 
.thursday...north winds 5 to 10 knots becoming northwest. waves
2 feet or less. 
.friday...west winds 5 to 10 knots. waves 1 to 2 feet. 

$$

fzus61 kcle 250739
glfle 
expires:202605251415;;611453

open lake forecast for lake erie
national weather service cleveland oh
339 am edt mon may 25 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...
high pressure 30.10 inches builds into the region today and will 
influence lake erie through mid-week.


lez164>166-251415-
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-
339 am edt mon may 25 2026

.today...north winds 10 knots or less becoming northeast. waves
1 foot or less. 
.tonight...light and variable winds. waves 1 foot or less. 
.tuesday...light and variable winds. waves 1 foot or less. 
.tuesday night...light and variable winds becoming southwest 5 to
10 knots. waves 1 foot or less. 
.wednesday...west winds less than 10 knots becoming north 10 to
15 knots. waves 2 feet or less. 
.thursday...northeast winds 5 to 15 knots becoming north. waves
1 to 2 feet. 
.friday...west winds 5 to 15 knots becoming north. waves 2 feet
or less. 

$$

fzus61 kcle 250739
glfle 
expires:202605251415;;611454

open lake forecast for lake erie
national weather service cleveland oh
339 am edt mon may 25 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...
high pressure 30.10 inches builds into the region today and will 
influence lake erie through mid-week.


lez061-167>169-251415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
339 am edt mon may 25 2026

.today...northwest winds 5 to 10 knots becoming light and
variable. waves 1 foot or less. 
.tonight...light and variable winds. waves 1 foot or less. 
.tuesday...south winds less than 10 knots becoming west. waves
1 foot or less. 
.tuesday night...southwest winds 10 knots or less. waves 1 foot
or less. 
.wednesday...southwest winds 10 knots or less becoming north
10 to 15 knots. waves 2 feet or less. 
.thursday...northeast winds 5 to 10 knots becoming northwest.
waves 2 feet or less. 
.friday...west winds 10 knots or less becoming northwest 10 to
15 knots. waves 2 feet or less. 

$$

fzus61 kcle 250739
glfle 
expires:202605251415;;611452

open lake forecast for lake erie
national weather service cleveland oh
339 am edt mon may 25 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...
high pressure 30.10 inches builds into the region today and will 
influence lake erie through mid-week.


lez162-163-251415-
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-
339 am edt mon may 25 2026

.today...north winds 10 knots or less becoming southeast. patchy
dense fog early. waves 1 foot or less. 
.tonight...southeast winds less than 10 knots. waves 1 foot or
less. 
.tuesday...light and variable winds. waves 1 foot or less. 
.tuesday night...southeast winds less than 10 knots becoming
southwest. waves 1 foot or less. 
.wednesday...west winds less than 10 knots becoming northeast
10 to 15 knots. waves 2 feet or less. 
.thursday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.friday...northwest winds 10 knots or less becoming northeast
10 to 15 knots. waves 2 feet or less. 

$$

fzus63 kdtx 250735
glfsc 
expires:202605251545;;611249

lake st clair forecast
national weather service detroit/pontiac mi
335 am edt mon may 25 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...light winds prevail today across the central great
lakes. a cold front slowly sags south across lake huron late
tuesday through wednesday, with breezy southwest winds ahead of
the front. this front moves south across the rest of the area
wednesday into wednesday night, as high pressure builds in from
the north. varying winds are expected through the end of the
week.


lcz460-251545-
lake st clair-
335 am edt mon may 25 2026

.today...north winds 5 to 10 knots early in the morning becoming
light and variable...then becoming southeast 5 to 10 knots late in
the afternoon. partly sunny in the morning then clearing. waves 2
feet or less.
.tonight...south winds 5 to 10 knots becoming light and variable.
clear. waves 2 feet or less.
.tuesday...light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. mostly sunny. waves 2 feet or less.
.tuesday night...southwest winds 5 to 10 knots becoming light and
variable. partly cloudy. waves 2 feet or less.
.wednesday...light and variable winds becoming northeast 15 to 20
knots. partly cloudy. waves 2 feet or less.
.thursday...northeast winds 10 to 15 knots. clear. waves 2 feet or
less.
.friday...northeast winds 10 to 15 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 250735
glflh 
expires:202605251545;;611250

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 am edt mon may 25 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...light winds prevail today across the central great
lakes. a cold front slowly sags south across lake huron late
tuesday through wednesday, with breezy southwest winds ahead of
the front. this front moves south across the rest of the area
wednesday into wednesday night, as high pressure builds in from
the north. varying winds are expected through the end of the
week.


lhz361-251545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
335 am edt mon may 25 2026

.today...light and variable winds becoming east 5 to 10 knots in
the afternoon. areas of dense fog in the morning. waves 2 feet or
less. 
.tonight...southeast winds 5 to 10 knots becoming southwest 10 to
15 knots after midnight...then increasing to 15 to 20 knots early
in the morning. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots early in the afternoon. waves 2 to 4 feet. 
.tuesday night...northwest winds 10 to 15 knots decreasing to
5 to 10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.wednesday...northwest winds 5 to 10 knots. waves 2 feet or less.
.thursday...north winds 5 to 10 knots early in the morning
becoming light and variable...then becoming southwest 5 to
10 knots early in the evening veering to the west. waves 2 feet
or less. 
.friday...northwest winds 5 to 10 knots becoming west 10 to
15 knots . waves 2 feet or less. 


$$

fzus63 kdtx 250735
glflh 
expires:202605251545;;611251

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 am edt mon may 25 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...light winds prevail today across the central great
lakes. a cold front slowly sags south across lake huron late
tuesday through wednesday, with breezy southwest winds ahead of
the front. this front moves south across the rest of the area
wednesday into wednesday night, as high pressure builds in from
the north. varying winds are expected through the end of the
week.


lhz362-363-251545-
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-
335 am edt mon may 25 2026

.today...light and variable winds becoming south 5 to 10 knots in
the late morning and early afternoon...then increasing to 10 to
15 knots late in the afternoon. areas of dense fog in the
morning. waves 2 feet or less. 
.tonight...south winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots early in the afternoon. waves 2 to 4 feet. 
.tuesday night...north winds 10 to 15 knots decreasing to 5 to
10 knots by midnight...then backing to the northwest after
midnight. waves 2 to 4 feet. 
.wednesday...north winds 5 to 10 knots increasing to 10 to
15 knots late in the evening. waves 1 to 3 feet. 
.thursday...north winds 5 to 10 knots backing to the west by
midnight. waves 1 to 3 feet. 
.friday...west winds 5 to 10 knots veering to the northwest by
midnight. waves 2 feet or less. 


$$

fzus63 kdtx 250735
glflh 
expires:202605251545;;611252

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 am edt mon may 25 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...light winds prevail today across the central great
lakes. a cold front slowly sags south across lake huron late
tuesday through wednesday, with breezy southwest winds ahead of
the front. this front moves south across the rest of the area
wednesday into wednesday night, as high pressure builds in from
the north. varying winds are expected through the end of the
week.


lhz462>464-251545-
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-
335 am edt mon may 25 2026

.today...light and variable winds becoming southeast 5 to
10 knots in the afternoon. areas of dense fog in the morning.
waves 2 feet or less. 
.tonight...south winds 5 to 10 knots increasing to 10 to 15 knots
in the late evening and overnight. waves 2 feet or less. 
.tuesday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots veering to the
northwest in the late evening and overnight. waves 1 to 3 feet. 
.wednesday...north winds 5 to 10 knots increasing to 10 to
15 knots late in the afternoon. waves 2 feet or less. 
.thursday...north winds 10 to 15 knots decreasing to 5 to
10 knots early in the evening...then becoming light and variable
by midnight. waves 1 to 3 feet. 
.friday...west winds 5 to 10 knots veering to the northwest by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 250808
glflm 
expires:202605251530;;612634

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
308 am cdt mon may 25 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...

high pressure around 30.2 inches will move from lower michigan to
the lower great lakes today. the moist southerly flow over the 
cold waters of lake michigan will maintain dense fog over much of 
the lake this morning. a dense fog advisory is in effect. areas of
fog, possibly dense, may continue into the afternoon. 

modest southerly winds will continue tonight into tuesday, while  
high pressure around 30.3 inches is expected to build toward 
eastern hudson bay tuesday into wednesday. this will eventually
move a cold front southward over lake michigan for tuesday night
and wednesday. winds will shift northeasterly after the frontal
passage. 


lmz261-362-364-366-563-565-567-868-251530-
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-
308 am cdt mon may 25 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 10 am cdt this morning...

.today...south winds 10 to 20 kt increasing to 15 to 25 kt.
widespread dense fog this morning. waves 2 to 4 ft building to
3 to 5 ft. 
.tonight...south winds 15 to 25 kt becoming southwest to 30 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.tuesday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.tuesday night...southwest winds 10 to 20 kt backing to northeast
5 to 10 kt overnight. waves 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 2 ft building to 3 to 5 ft. 
.wednesday night...north winds 15 to 25 kt becoming northeast
10 to 20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft. 
.thursday...northeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.friday...northwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 250808
glflm 
expires:202605251530;;612635

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
308 am cdt mon may 25 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...

high pressure around 30.2 inches will move from lower michigan to
the lower great lakes today. the moist southerly flow over the 
cold waters of lake michigan will maintain dense fog over much of 
the lake this morning. a dense fog advisory is in effect. areas of
fog, possibly dense, may continue into the afternoon. 

modest southerly winds will continue tonight into tuesday, while  
high pressure around 30.3 inches is expected to build toward 
eastern hudson bay tuesday into wednesday. this will eventually
move a cold front southward over lake michigan for tuesday night
and wednesday. winds will shift northeasterly after the frontal
passage. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-251530-
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-
308 am cdt mon may 25 2026

sheboygan wi to pentwater mi south...

...dense fog advisory in effect until 10 am cdt this morning...

.today...south winds 10 to 15 kt increasing to 10 to 20 kt.
patchy dense fog this morning. waves 1 to 3 ft building to 3 to
5 ft. 
.tonight...south winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft. 
.tuesday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.tuesday night...south winds 10 to 20 kt becoming southwest 5 to
10 kt overnight. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 2 ft building to 3 to 5 ft. 
.wednesday night...north winds 15 to 25 kt becoming northeast
10 to 20 kt. waves 4 to 7 ft occasionally to 9 ft. 
.thursday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.friday...northeast winds 5 to 10 kt becoming north. waves 1 to
2 ft.  

$$

fzus63 kmqt 250801
glfls 
expires:202605252000;;612093

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon may 25 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... 

a 30.1 inch ridge forms today over the lower great lakes as a 29.7 
inch low moves from manitoba to northern ontario. by tuesday night, 
a 30.2 inch high over the western shores of hudson bay will extend 
weak ridging over lake superior with 29.5 inch troughing forming in 
the lee of the northern us rockies. pressure rises to 30.3 inches 
over the lake through mid week as the high shifts southeast over 
northern ontario on wednesday while low pressure over the west 
weakens through thursday. by friday morning, the high will weaken to 
30.1 inches as it moves to the southern great lakes while a wewak 
30.0 inch trough will be over northern ontario.



lsz266-252000-
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 mon may 25 2026

.early this morning...south winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.today...south winds 5 to 15 knots increasing to 10 to 20 knots
late. patchy fog through early afternoon. a slight chance of
showers and thunderstorms by mid afternoon. waves calm to 2 feet.
.tonight...south winds 10 to 20 knots becoming southwest 15 to
25 knots after midnight, then veering west late. a slight chance
of showers and thunderstorms through midnight. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.tuesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. waves
subsiding to calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 
.friday...northwest winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 250801
glfls 
expires:202605252000;;612094

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon may 25 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... 

a 30.1 inch ridge forms today over the lower great lakes as a 29.7 
inch low moves from manitoba to northern ontario. by tuesday night, 
a 30.2 inch high over the western shores of hudson bay will extend 
weak ridging over lake superior with 29.5 inch troughing forming in 
the lee of the northern us rockies. pressure rises to 30.3 inches 
over the lake through mid week as the high shifts southeast over 
northern ontario on wednesday while low pressure over the west 
weakens through thursday. by friday morning, the high will weaken to 
30.1 inches as it moves to the southern great lakes while a wewak 
30.0 inch trough will be over northern ontario.



lsz267-252000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt mon may 25 2026

...dense fog advisory in effect until 8 am edt this morning...

.early this morning...south winds 10 to 20 knots. areas of dense
fog. waves calm to 2 feet. 
.today...south winds 5 to 15 knots increasing to 10 to 20 knots
late. patchy fog through early afternoon. a slight chance of rain
showers by mid afternoon. waves calm to 2 feet. 
.tonight...south winds 15 to 25 knots veering southwest after
midnight, then becoming west 10 to 20 knots late. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...north winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 250801
glfls 
expires:202605252000;;612090

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon may 25 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... 

a 30.1 inch ridge forms today over the lower great lakes as a 29.7 
inch low moves from manitoba to northern ontario. by tuesday night, 
a 30.2 inch high over the western shores of hudson bay will extend 
weak ridging over lake superior with 29.5 inch troughing forming in 
the lee of the northern us rockies. pressure rises to 30.3 inches 
over the lake through mid week as the high shifts southeast over 
northern ontario on wednesday while low pressure over the west 
weakens through thursday. by friday morning, the high will weaken to 
30.1 inches as it moves to the southern great lakes while a wewak 
30.0 inch trough will be over northern ontario.



lsz263-252000-
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 mon may 25 2026

.early this morning...southwest winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...south winds 5 to 15 knots veering southwest in the
afternoon. patchy dense fog through early afternoon. waves calm
to 2 feet. 
.tonight...southwest winds 5 to 15 knots becoming west 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
a slight chance of showers and thunderstorms through midnight.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots veering northeast in the
afternoon, then becoming east less than 10 knots late. waves calm
to 2 feet. 
.tuesday night...northeast winds less than 10 knots increasing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves building to 2 to 4 feet. 
.wednesday night...east winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday...east winds 5 to 15 knots backing north. waves calm to
2 feet. 
.friday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 

$$

fzus63 kmqt 250801
glfls 
expires:202605252000;;612091

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon may 25 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... 

a 30.1 inch ridge forms today over the lower great lakes as a 29.7 
inch low moves from manitoba to northern ontario. by tuesday night, 
a 30.2 inch high over the western shores of hudson bay will extend 
weak ridging over lake superior with 29.5 inch troughing forming in 
the lee of the northern us rockies. pressure rises to 30.3 inches 
over the lake through mid week as the high shifts southeast over 
northern ontario on wednesday while low pressure over the west 
weakens through thursday. by friday morning, the high will weaken to 
30.1 inches as it moves to the southern great lakes while a wewak 
30.0 inch trough will be over northern ontario.



lsz264-252000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt mon may 25 2026

.early this morning...southwest winds less than 10 knots. patchy
fog. waves calm to 2 feet. 
.today...south winds less than 10 knots increasing to 5 to
15 knots in the afternoon. patchy fog through early afternoon. a
slight chance of rain showers by mid afternoon. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering west late. a slight chance
of showers and thunderstorms through midnight. waves building to
1 to 3 feet. 
.tuesday...northwest winds 5 to 15 knots backing west in the
afternoon, then becoming south less than 10 knots late. waves
subsiding to calm to 2 feet. 
.tuesday night...south winds less than 10 knots becoming
northeast 5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...north winds 5 to 15 knots becoming east less
than 10 knots after midnight. waves calm to 2 feet. 
.thursday...east winds less than 10 knots veering south. waves
calm to 2 feet. 
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$

fzus63 kmqt 250801
glfls 
expires:202605252000;;612089

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon may 25 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... 

a 30.1 inch ridge forms today over the lower great lakes as a 29.7 
inch low moves from manitoba to northern ontario. by tuesday night, 
a 30.2 inch high over the western shores of hudson bay will extend 
weak ridging over lake superior with 29.5 inch troughing forming in 
the lee of the northern us rockies. pressure rises to 30.3 inches 
over the lake through mid week as the high shifts southeast over 
northern ontario on wednesday while low pressure over the west 
weakens through thursday. by friday morning, the high will weaken to 
30.1 inches as it moves to the southern great lakes while a wewak 
30.0 inch trough will be over northern ontario.



lsz162-252000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt mon may 25 2026 /300 am cdt mon may 25 2026/

.early this morning...southwest winds less than 10 knots. waves
calm to 2 feet. 
.today...south winds 5 to 15 knots veering southwest in the
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. waves calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots veering northeast in the
afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet. 
.wednesday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 250801
glfls 
expires:202605252000;;612092

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon may 25 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... 

a 30.1 inch ridge forms today over the lower great lakes as a 29.7 
inch low moves from manitoba to northern ontario. by tuesday night, 
a 30.2 inch high over the western shores of hudson bay will extend 
weak ridging over lake superior with 29.5 inch troughing forming in 
the lee of the northern us rockies. pressure rises to 30.3 inches 
over the lake through mid week as the high shifts southeast over 
northern ontario on wednesday while low pressure over the west 
weakens through thursday. by friday morning, the high will weaken to 
30.1 inches as it moves to the southern great lakes while a wewak 
30.0 inch trough will be over northern ontario.



lsz265-252000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt mon may 25 2026

.early this morning...southwest winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...south winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing southeast late. a slight chance of
showers and thunderstorms by mid afternoon. waves calm to 2 feet.
.tonight...south winds 10 to 20 knots becoming southwest 15 to
25 knots after midnight, then veering west late. a slight chance
of showers and thunderstorms through midnight. waves building to
1 to 3 feet. 
.tuesday...northwest winds 5 to 15 knots veering north in the
afternoon, then veering east late. waves subsiding to calm to
2 feet. 
.tuesday night...south winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing north by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 
.friday...northwest winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$