fzus61 kbuf 300802
glflo 
expires:202609301500;;289552

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt wed sep 30 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 29.9 inch will shift east into the canadian maritimes 
today, while a 30.1 inch high builds just off the mid atlantic 
coast. a warm front will lift across the lake thursday, followed by 
a cold front crossing the lower great lakes later thursday night and 
friday morning. a 30.3 inch high is then forecast to build into the 
western great lakes friday night and over the eastern great lakes by 
saturday, before exiting into northern new england sunday. 
meanwhile, a cold front will then cross the eastern great lakes 
sunday night, with another 30.3 inch high building from the western 
great lakes into the eastern great lakes on monday.


loz062-301500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt wed sep 30 2026

.today...southwest winds 5 to 10 knots becoming south. waves
2 feet or less. 
.tonight...south winds 5 to 15 knots becoming southwest. a chance
of showers after midnight. waves 2 feet or less. 
.thursday...southwest winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.thursday night...southwest winds 10 to 15 knots becoming west.
showers. waves 1 to 3 feet. 
.friday...northwest winds 10 to 15 knots. showers during the day.
waves 1 to 3 feet. 
.saturday...north winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.sunday...south winds 5 to 10 knots becoming northwest and
increasing to 15 to 20 knots. waves 1 foot or less building to
3 to 5 feet. 

$$

fzus61 kbuf 300802
glflo 
expires:202609301500;;289553

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt wed sep 30 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 29.9 inch will shift east into the canadian maritimes 
today, while a 30.1 inch high builds just off the mid atlantic 
coast. a warm front will lift across the lake thursday, followed by 
a cold front crossing the lower great lakes later thursday night and 
friday morning. a 30.3 inch high is then forecast to build into the 
western great lakes friday night and over the eastern great lakes by 
saturday, before exiting into northern new england sunday. 
meanwhile, a cold front will then cross the eastern great lakes 
sunday night, with another 30.3 inch high building from the western 
great lakes into the eastern great lakes on monday.


loz063>065-301500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt wed sep 30 2026

.today...south winds 5 to 10 knots becoming southeast. waves
2 feet or less. 
.tonight...south winds 5 to 15 knots becoming southwest. a chance
of showers late. waves 2 feet or less. 
.thursday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday night...southwest winds 10 to 15 knots. showers. waves
1 to 3 feet. 
.friday...west winds 10 to 15 knots becoming north 15 to
20 knots. showers during the day, then a chance of showers friday
night. waves 1 to 2 feet building to 2 to 4 feet. 
.saturday...north winds 5 to 15 knots becoming southeast 10 knots
or less. waves 1 to 3 feet subsiding to 1 foot or less. 
.sunday...south winds 10 to 15 knots becoming west and increasing
to 15 to 25 knots. a chance of showers sunday night. waves 1 to
3 feet building to 3 to 6 feet. 

$$

fzus61 kcle 300801
glfle 
expires:202609301430;;289433

open lake forecast for lake erie
national weather service cleveland oh
401 am edt wed sep 30 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 will remain centered over the mid 
atlantic through thursday before drifting offshore. a warm front 
will lift across the lake wednesday night, followed by a cold 
front thursday night into early friday. high pressure 30.20 inches
returns on saturday before another cold front crosses the lake
sunday.


lez162-163-301430-
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-
401 am edt wed sep 30 2026

.today...south winds 5 to 15 knots. a chance of showers late.
waves 2 feet or less. 
.tonight...south winds 5 to 15 knots. a chance of showers through
the early overnight, then a slight chance of showers late. waves
2 feet or less. 
.thursday...southwest winds 5 to 15 knots. a chance of showers in
the afternoon. waves 1 to 2 feet. 
.thursday night...southwest winds 5 to 15 knots becoming west. a
chance of showers in the evening, then showers overnight. waves
2 feet or less. 
.friday...north winds 10 to 15 knots becoming northeast. showers
likely during the day. waves 1 to 3 feet. 
.saturday...northeast winds 5 to 15 knots becoming southeast.
waves 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming northwest and
increasing to 15 to 20 knots. waves 2 feet or less. 

$$

fzus61 kcle 300801
glfle 
expires:202609301430;;289434

open lake forecast for lake erie
national weather service cleveland oh
401 am edt wed sep 30 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 will remain centered over the mid 
atlantic through thursday before drifting offshore. a warm front 
will lift across the lake wednesday night, followed by a cold 
front thursday night into early friday. high pressure 30.20 inches
returns on saturday before another cold front crosses the lake
sunday.


lez164>167-301430-
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-
401 am edt wed sep 30 2026

.today...south winds 5 to 15 knots becoming southwest. a slight
chance of showers late. waves 1 to 3 feet. 
.tonight...south winds 5 to 15 knots. a chance of showers. waves
1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.thursday night...southwest winds around 10 knots becoming west
and increasing to 15 to 20 knots. a chance of showers in the
evening, then showers overnight. waves 1 to 3 feet. 
.friday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. showers during the day. waves 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots becoming southeast.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots becoming northwest 15 to
20 knots. waves 1 to 2 feet building to 2 to 4 feet. 

$$

fzus61 kcle 300801
glfle 
expires:202609301430;;289435

open lake forecast for lake erie
national weather service cleveland oh
401 am edt wed sep 30 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 will remain centered over the mid 
atlantic through thursday before drifting offshore. a warm front 
will lift across the lake wednesday night, followed by a cold 
front thursday night into early friday. high pressure 30.20 inches
returns on saturday before another cold front crosses the lake
sunday.


lez061-168-169-301430-
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-
401 am edt wed sep 30 2026

.today...south winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.tonight...south winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 2 feet or less. 
.thursday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers in the morning. waves 1 to 3 feet. 
.thursday night...southwest winds 10 to 15 knots. a chance of
showers in the evening, then showers overnight. waves 1 to
3 feet. 
.friday...northwest winds 10 to 15 knots becoming north. showers
during the day. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots becoming southeast.
waves 1 to 3 feet subsiding to 1 foot or less. 
.sunday...south winds 5 to 15 knots becoming northwest 15 to
20 knots. waves 2 feet or less building to 2 to 4 feet. 

$$

fzus63 kdtx 300759
glflh 
expires:202609301600;;289316

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt wed sep 30 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, 30.10 inches, exits as southwest winds
slowly increase ahead of a cold front. this front gets hung up 
over southern lower michigan, leading to occasional showers today 
through friday.


lhz361-301600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
359 am edt wed sep 30 2026

.today...south winds 10 to 15 knots. showers in the morning...
then a chance of showers in the afternoon. waves 1 to 3 feet. 
.tonight...south winds 5 to 10 knots. waves 1 to 3 feet. 
.thursday...southwest winds 5 to 10 knots becoming west 10 to
15 knots early in the afternoon. waves 1 to 3 feet. 
.thursday night...northwest winds 10 to 15 knots. waves 1 to
3 feet. 
.friday...northwest winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots late in the morning...then
decreasing to 10 to 15 knots late in the evening. waves 2 feet or
less building to 2 to 4 feet late in the afternoon...then
subsiding to 1 to 3 feet late in the evening. 
.saturday...light and variable winds becoming south 5 to 10 knots
by midnight. a chance of. waves 2 feet or less. 
.sunday...south winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots in the late morning and
early afternoon...then veering to the northwest with gusts to
35 knot gales . a chance of showers until afternoon. waves 1 to
3 feet building to 3 to 5 feet . 


$$

fzus63 kdtx 300759
glfsc 
expires:202609301600;;289360

lake st clair forecast
national weather service detroit/pontiac mi
359 am edt wed sep 30 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, 30.10 inches, exits as southwest winds
slowly increase ahead of a cold front. this front gets hung up 
over southern lower michigan, leading to occasional showers today 
through friday.


lcz460-301600-
lake st clair-
359 am edt wed sep 30 2026

.today...southwest winds 5 to 10 knots becoming south 10 to 15 knots
late in the morning...then diminishing to 5 to 10 knots in the
afternoon. mostly cloudy. waves 2 feet or less.
.tonight...south winds 10 to 15 knots. cloudy. light showers likely.
waves 2 feet or less.
.thursday...southwest winds 10 to 15 knots diminishing to 5 to 10
knots early in the afternoon. mostly cloudy. light showers likely
early in the morning. waves 2 feet or less.
.thursday night...southwest winds 5 to 10 knots becoming northwest
10 to 15 knots after midnight. showers. waves 2 feet or less.
.friday...north winds 10 to 15 knots. mostly cloudy with light
showers in the morning...then mostly clear in the afternoon and
evening. waves 2 feet or less.
.saturday...east winds 10 to 15 knots. mostly clear. waves 2 feet or
less.
.sunday...northwest winds 15 to 20 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 300759
glflh 
expires:202609301600;;289318

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt wed sep 30 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, 30.10 inches, exits as southwest winds
slowly increase ahead of a cold front. this front gets hung up 
over southern lower michigan, leading to occasional showers today 
through friday.


lhz462>464-301600-
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-
359 am edt wed sep 30 2026

.today...south winds 10 to 15 knots. a chance of showers in the
afternoon. waves 1 to 3 feet. 
.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots late in the evening...then decreasing to 10 to 15 knots
after midnight. a chance of showers. waves 2 to 4 feet. 
.thursday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. showers likely in the morning...
then showers in the afternoon. waves 2 to 4 feet subsiding to
1 to 3 feet early in the afternoon. 
.thursday night...southwest winds 5 to 10 knots becoming
northwest 10 to 15 knots by midnight...then becoming north 15 to
20 knots after midnight. showers. waves 1 to 3 feet building to
2 to 4 feet after midnight. 
.friday...north winds 10 to 15 knots becoming northwest 15 to
20 knots. waves 2 to 4 feet. 
.saturday...north winds 5 to 10 knots early in the morning
becoming light and variable...then becoming east 5 to 10 knots by
midnight. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...south winds 5 to 10 knots becoming southwest 10 to
15 knots in the late morning and early afternoon...then becoming
west 15 to 20 knots early in the evening becoming northwest 20 to
25 knots by midnight. waves 2 feet or less building to 5 to
7 feet. waves occasionally around 10 feet. 


$$

fzus63 kdtx 300759
glflh 
expires:202609301600;;289317

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt wed sep 30 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, 30.10 inches, exits as southwest winds
slowly increase ahead of a cold front. this front gets hung up 
over southern lower michigan, leading to occasional showers today 
through friday.


lhz362-363-301600-
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-
359 am edt wed sep 30 2026

.today...south winds 10 to 15 knots increasing to 15 to 20 knots
with gusts to around 30 knots in the afternoon. a chance of
showers. waves 1 to 3 feet building to 3 to 5 feet in the
afternoon. 
.tonight...south winds 15 to 20 knots with gusts to around
30 knots becoming southwest 10 to 15 knots early in the morning.
waves 3 to 5 feet. 
.thursday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and afternoon. a chance of showers.
waves 3 to 5 feet. 
.thursday night...west winds 10 to 15 knots becoming northwest
15 to 20 knots by midnight...then decreasing to 10 to 15 knots
after midnight. a chance of showers. waves 2 to 4 feet. 
.friday...northwest winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots late in the morning...then
decreasing to 10 to 15 knots late in the evening. waves 2 to
4 feet building to 3 to 5 feet late in the afternoon. 
.saturday...north winds 5 to 10 knots early in the morning
becoming light and variable...then becoming southeast 5 to
10 knots by midnight. waves 2 to 4 feet subsiding to 2 feet or
less. 
.sunday...south winds 10 to 15 knots becoming southwest 15 to
20 knots in the late morning and early afternoon...then veering
to the west with gusts to 35 knot gales early in the evening
becoming northwest 20 to 25 knots with gusts to 35 knot gales by
midnight. waves 1 to 3 feet building to 4 to 6 feet . waves
occasionally around 8 feet. 


$$

fzus63 kmkx 300816
glflm 
expires:202609301530;;290705

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
316 am cdt wed sep 30 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...

southerly winds will increase through this morning, becoming 
southwest wednesday night into thursday, as a cold front 
approaches from the northern plains. wind gusts to 30 knots are 
possible around dawn and into the afternoon, along with building 
waves, particularly across central and northern portions of the 
lake. winds then ease tonight as they become southwesterly 

expect northwest winds in the wake of the front thursday 
afternoon, with north to northeast winds thursday night into 
friday. strong high pressure around 30.4 inches will overspread 
the great lakes friday night. a fast-moving low pressure system 
around 29.8 inches should move across or north of lake superior 
saturday night, with high pressure around 30.4 inches moving 
southeast into the region by early next week. northwest to north 
winds should result across lake michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-301530-
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-
316 am cdt wed sep 30 2026

sheboygan wi to pentwater mi south...

.today...south winds 15 to 25 kt increasing to 30 kt. showers
this morning, then chance of showers this afternoon. waves 4 to
6 ft occasionally to 8 ft building to 7 to 10 ft occasionally to
13 ft. 
.tonight...south winds to 30 kt becoming southwest 10 to 15 kt.
chance of showers and slight chance of thunderstorms in the
evening, then showers and slight chance of thunderstorms
overnight. waves 6 to 9 ft occasionally to 12 ft subsiding to
3 to 5 ft. 
.thursday...southwest winds 10 to 15 kt becoming west. showers
likely in the morning, then showers in the afternoon. waves 2 to
4 ft subsiding to 1 to 2 ft. 
.thursday night...north winds 10 to 20 kt. showers in the
evening, then chance of showers overnight. waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft. 
.friday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.saturday...east winds 10 to 15 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft. 
.sunday...west winds 15 to 25 kt becoming northwest. waves 3 to
5 ft.  

$$

fzus63 kmkx 300816
glflm 
expires:202609301530;;290704

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
316 am cdt wed sep 30 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...

southerly winds will increase through this morning, becoming 
southwest wednesday night into thursday, as a cold front 
approaches from the northern plains. wind gusts to 30 knots are 
possible around dawn and into the afternoon, along with building 
waves, particularly across central and northern portions of the 
lake. winds then ease tonight as they become southwesterly 

expect northwest winds in the wake of the front thursday 
afternoon, with north to northeast winds thursday night into 
friday. strong high pressure around 30.4 inches will overspread 
the great lakes friday night. a fast-moving low pressure system 
around 29.8 inches should move across or north of lake superior 
saturday night, with high pressure around 30.4 inches moving 
southeast into the region by early next week. northwest to north 
winds should result across lake michigan.


lmz261-362-364-366-563-565-567-868-301530-
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-
316 am cdt wed sep 30 2026

sheboygan wi to pentwater mi north...

.today...south winds to 30 kt becoming southwest. chance of
showers. waves 6 to 9 ft occasionally to 12 ft. 
.tonight...southwest winds to 30 kt diminishing to 10 to 20 kt.
chance of showers overnight. waves 6 to 9 ft occasionally to
12 ft subsiding to 3 to 5 ft. 
.thursday...southwest winds 10 to 15 kt veering to northwest
10 to 20 kt. chance of showers in the afternoon. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.thursday night...north winds 10 to 20 kt. waves 1 to 3 ft
building to 2 to 4 ft. 
.friday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.friday night...north winds 15 to 25 kt becoming northeast 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...southeast winds 5 to 10 kt becoming south. waves 1 to
2 ft. 
.sunday...west winds to 30 kt becoming northwest. waves 3 to
5 ft.  

$$

fzus63 kmqt 300801
glfls 
expires:202609302000;;289484

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 30 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 29.2 inch low over northern manitoba this morning deepens to 29.0 
inches over hudson bay this afternoon, sending a 29.7 inch trough 
over lake superior today. 29.8 inch troughing lingers over the lake 
through thursday morning between the canadian low and another 29.7 
low over the south plains. high pressure builds to 30.3 inches over 
the northern plains thursday night into friday before shifting east 
to the great lakes friday night and saturday. a weak 29.9 inch 
trough crosses lake superior saturday night and sunday, with 30.3 
inch high pressure quickly returning sunday night into monday. 




lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt wed sep 30 2026 /301 am cdt wed sep 30 2026/

.early this morning...southwest winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming northwest 10 to
20 knots late. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming west 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202609302000;;289485

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 30 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 29.2 inch low over northern manitoba this morning deepens to 29.0 
inches over hudson bay this afternoon, sending a 29.7 inch trough 
over lake superior today. 29.8 inch troughing lingers over the lake 
through thursday morning between the canadian low and another 29.7 
low over the south plains. high pressure builds to 30.3 inches over 
the northern plains thursday night into friday before shifting east 
to the great lakes friday night and saturday. a weak 29.9 inch 
trough crosses lake superior saturday night and sunday, with 30.3 
inch high pressure quickly returning sunday night into monday. 




lsz263-302000-
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-
401 am edt wed sep 30 2026

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

$$

fzus63 kmqt 300801
glfls 
expires:202609302000;;289486

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 30 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 29.2 inch low over northern manitoba this morning deepens to 29.0 
inches over hudson bay this afternoon, sending a 29.7 inch trough 
over lake superior today. 29.8 inch troughing lingers over the lake 
through thursday morning between the canadian low and another 29.7 
low over the south plains. high pressure builds to 30.3 inches over 
the northern plains thursday night into friday before shifting east 
to the great lakes friday night and saturday. a weak 29.9 inch 
trough crosses lake superior saturday night and sunday, with 30.3 
inch high pressure quickly returning sunday night into monday. 




lsz264-302000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt wed sep 30 2026

.early this morning...southwest winds 10 to 20 knots. waves 2 to
4 feet. 
.today...southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.tonight...southwest winds 5 to 15 knots veering northwest late.
waves subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.thursday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.friday...northwest winds 15 to 25 knots backing west by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 
.friday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming west 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet. 
.sunday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202609302000;;289487

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 30 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 29.2 inch low over northern manitoba this morning deepens to 29.0 
inches over hudson bay this afternoon, sending a 29.7 inch trough 
over lake superior today. 29.8 inch troughing lingers over the lake 
through thursday morning between the canadian low and another 29.7 
low over the south plains. high pressure builds to 30.3 inches over 
the northern plains thursday night into friday before shifting east 
to the great lakes friday night and saturday. a weak 29.9 inch 
trough crosses lake superior saturday night and sunday, with 30.3 
inch high pressure quickly returning sunday night into monday. 




lsz265-302000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt wed sep 30 2026

.early this morning...south winds 10 to 20 knots. waves 1 to
3 feet. 
.today...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering west late. waves building
to 1 to 3 feet. 
.thursday...northwest winds 20 to 30 knots backing west late.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.thursday night...northwest winds 20 to 30 knots. waves building
to 2 to 4 feet. 
.friday...northwest gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.friday night...west winds 10 to 20 knots backing southwest after
midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots increasing to 20 to
30 knots. a chance of showers. waves building to 1 to 3 feet. 
.sunday...northwest gales to 45 knots diminishing to 20 to
30 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202609302000;;289488

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 30 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 29.2 inch low over northern manitoba this morning deepens to 29.0 
inches over hudson bay this afternoon, sending a 29.7 inch trough 
over lake superior today. 29.8 inch troughing lingers over the lake 
through thursday morning between the canadian low and another 29.7 
low over the south plains. high pressure builds to 30.3 inches over 
the northern plains thursday night into friday before shifting east 
to the great lakes friday night and saturday. a weak 29.9 inch 
trough crosses lake superior saturday night and sunday, with 30.3 
inch high pressure quickly returning sunday night into monday. 




lsz266-302000-
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-
401 am edt wed sep 30 2026

.early this morning...south winds 15 to 25 knots. a chance of
showers. waves 3 to 5 feet occasionally to 7 feet. 
.today...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing south late. waves
subsiding to 1 to 3 feet. 
.tonight...south winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then veering west late. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.thursday...northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 2 to 4 feet. 
.thursday night...northwest winds 15 to 25 knots. waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet. 
.friday...northwest winds 20 to 30 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday night...northwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots increasing to 20 to
30 knots. showers likely. waves building to 2 to 4 feet. 
.sunday...northwest gales to 45 knots. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202609302000;;289489

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 30 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 29.2 inch low over northern manitoba this morning deepens to 29.0 
inches over hudson bay this afternoon, sending a 29.7 inch trough 
over lake superior today. 29.8 inch troughing lingers over the lake 
through thursday morning between the canadian low and another 29.7 
low over the south plains. high pressure builds to 30.3 inches over 
the northern plains thursday night into friday before shifting east 
to the great lakes friday night and saturday. a weak 29.9 inch 
trough crosses lake superior saturday night and sunday, with 30.3 
inch high pressure quickly returning sunday night into monday. 




lsz267-302000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt wed sep 30 2026

.early this morning...south winds 15 to 25 knots. a chance of
showers. waves 2 to 4 feet. 
.today...south winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then backing south late. a slight
chance of showers. waves subsiding to calm to 2 feet. 
.tonight...south winds 10 to 20 knots veering southwest after
midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.thursday night...northwest winds 15 to 25 knots. waves 2 to
4 feet. 
.friday...northwest winds 20 to 30 knots. waves building to 5 to
9 feet occasionally to 11 feet. 
.friday night...northwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots increasing to 15 to
25 knots. showers likely. waves building to 2 to 4 feet. 
.sunday...northwest gales to 40 knots diminishing to 20 to
30 knots. a chance of showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$