fzus63 kdtx 150741
glflh 
expires:202608151545;;220472

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 am edt sat aug 15 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, 30.20 inches, currently centered over
northern lake huron will hold most of the day before sliding
southeast through the eastern lakes. the next low pressure system
will pass through the region tonight and sunday bringing the next
thunderstorm chances.


lhz462>464-151545-
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-
341 am edt sat aug 15 2026

.today...east winds 5 to 10 knots in the morning becoming light
and variable...then becoming east 5 to 10 knots late in the
afternoon. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots becoming southeast 10 to
15 knots late in the evening...then increasing to 15 to 20 knots
after midnight decreasing to 10 to 15 knots early in the morning.
waves 1 to 3 feet building to 2 to 4 feet early in the morning. 
.sunday...south winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and afternoon. waves 2 to 4 feet subsiding to
1 to 3 feet in the late morning and afternoon. 
.sunday night...west winds 5 to 10 knots becoming northwest 15 to
20 knots. waves 2 feet or less building to 2 to 4 feet in the
late evening and overnight. 
.monday...northwest winds 10 to 15 knots becoming light and
variable. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
afternoon. 
.tuesday...south winds 5 to 10 knots increasing to 10 to 15 knots
by midnight. waves 2 feet or less. 
.wednesday...southwest winds 10 to 15 knots veering to the north
by midnight. showers likely until afternoon. a chance of
thunderstorms until early evening. waves 1 to 3 feet building to
2 to 4 feet . 


$$

fzus63 kdtx 150741
glflh 
expires:202608151545;;220470

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 am edt sat aug 15 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, 30.20 inches, currently centered over
northern lake huron will hold most of the day before sliding
southeast through the eastern lakes. the next low pressure system
will pass through the region tonight and sunday bringing the next
thunderstorm chances.


lhz361-151545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
341 am edt sat aug 15 2026

.today...light and variable winds becoming east 10 to 15 knots.
waves 2 feet or less. 
.tonight...southeast winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet early in the morning. 
.sunday...south winds 5 to 10 knots veering to the west early in
the afternoon. a chance of showers. waves 1 to 3 feet. 
.sunday night...northwest winds 10 to 15 knots increasing to
15 to 20 knots by midnight...then decreasing to 10 to 15 knots
after midnight. waves 3 to 5 feet. 
.monday...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.tuesday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then veering
to the west . a chance of showers. rain showers likely by
midnight. waves 1 to 3 feet. 
.wednesday...north winds 5 to 10 knots increasing to 15 to
20 knots. showers likely early in the morning...then a chance of
showers until early evening. waves 2 feet or less building to
2 to 4 feet . 


$$

fzus63 kdtx 150741
glflh 
expires:202608151545;;220471

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 am edt sat aug 15 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, 30.20 inches, currently centered over
northern lake huron will hold most of the day before sliding
southeast through the eastern lakes. the next low pressure system
will pass through the region tonight and sunday bringing the next
thunderstorm chances.


lhz362-363-151545-
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-
341 am edt sat aug 15 2026

.today...east winds 5 to 10 knots. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots increasing to 10 to 15 knots
by midnight...then veering to the southeast early in the morning.
waves 1 to 3 feet building to 2 to 4 feet early in the morning. 
.sunday...south winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and afternoon. a chance of showers in the
afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and afternoon. 
.sunday night...northwest winds 5 to 10 knots increasing to 15 to
20 knots in the late evening and overnight. waves 3 to 5 feet. 
.monday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots late in the morning...then becoming light and variable
late in the afternoon becoming west 5 to 10 knots late in the
evening. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 10 knots becoming south 10 to
15 knots until early evening...then becoming southwest 5 to
10 knots by midnight. a chance of showers until early evening.
rain showers likely by midnight. waves 2 feet or less. 
.wednesday...southwest winds 10 to 15 knots becoming northwest
15 to 20 knots by midnight. showers likely early in the morning...
then a chance of showers and thunderstorms until early evening.
waves 1 to 3 feet building to 2 to 4 feet . 


$$

fzus63 kmkx 150813
glflm 
expires:202608151515;;222276

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 am cdt sat aug 15 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...

periods of showers and storms continue over the southern half of
lake michigan today and tonight as a warm front remains stalled 
south over il/in. low pressure around 29.8 inches over ks will 
track to the northeast this morning, then east toward southern 
lake michigan this evening. expect increasing southeasterly winds
and waves across the southern two thirds of lake michigan through
the daytime hours today as the low pressure tracks through the
region then winds diminish tonight as it closes in. a cold front 
will then sweep across the lake overnight into sunday morning, 
with chances for showers and weak storms. expect a northwest 
wind shift behind the cold front into sunday. beyond this system,
a broad ridge of high pressure around 30.1 inches will push into 
the great lakes early next week before another potential system 
moves through the region midweek. 


lmz261-362-364-366-563-565-567-868-151515-
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-
313 am cdt sat aug 15 2026

sheboygan wi to pentwater mi north...

.today...east winds 10 to 20 kt. waves 3 to 5 ft. 
.tonight...east winds 10 to 20 kt veering to southwest 10 to
15 kt. slight chance of showers and thunderstorms overnight.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.sunday...west winds 10 to 15 kt becoming northwest 10 to 20 kt
late in the morning, then increasing to 15 to 25 kt early in the
afternoon becoming north to 30 kt late. chance of showers in the
morning. waves 1 to 2 ft building to 2 to 4 ft. 
.sunday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 2 to 4 ft. 
.monday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 1 to 3 ft. 
.monday night...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 2 to 4 ft. 
.wednesday...north winds 15 to 25 kt increasing to 30 kt. chance
of showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 150813
glflm 
expires:202608151515;;222277

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 am cdt sat aug 15 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...

periods of showers and storms continue over the southern half of
lake michigan today and tonight as a warm front remains stalled 
south over il/in. low pressure around 29.8 inches over ks will 
track to the northeast this morning, then east toward southern 
lake michigan this evening. expect increasing southeasterly winds
and waves across the southern two thirds of lake michigan through
the daytime hours today as the low pressure tracks through the
region then winds diminish tonight as it closes in. a cold front 
will then sweep across the lake overnight into sunday morning, 
with chances for showers and weak storms. expect a northwest 
wind shift behind the cold front into sunday. beyond this system,
a broad ridge of high pressure around 30.1 inches will push into 
the great lakes early next week before another potential system 
moves through the region midweek. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-151515-
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-
313 am cdt sat aug 15 2026

sheboygan wi to pentwater mi south...

.today...southeast winds 10 to 20 kt. chance of showers and
thunderstorms this morning, then chance of showers and slight
chance of thunderstorms this afternoon. waves 4 to 6 ft
occasionally to 8 ft. 
.tonight...southeast winds 10 to 15 kt veering to west. slight
chance of showers and thunderstorms overnight. waves 2 to 4 ft
subsiding to 1 to 2 ft. 
.sunday...west winds 10 to 20 kt becoming northwest 10 to 15 kt.
chance of showers in the morning. waves 1 to 2 ft. 
.sunday night...north winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...north winds 10 to 15 kt becoming northwest 10 to 20 kt.
waves 2 to 4 ft. 
.monday night...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft building to 1 to 3 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday...west winds 15 to 25 kt becoming north to 30 kt.
chance of showers and thunderstorms. waves 4 to 6 ft occasionally
to 8 ft.  

$$

fzus63 kmkx 150150
glflm 
expires:202608150930;;205494

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
850 pm cdt fri aug 14 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...

periods of showers and storms are expected to cross the southern 
half of lake michigan through sunday as a front remains stalled 
south over illinois and indiana. low pressure of 29.8 inches over 
kansas will track to the northeast and east toward southern lake 
michigan tonight into saturday. this low should help to bump up 
winds and waves across the southern two thirds of lake michigan 
into saturday. beyond this system, a broad ridge of high pressure 
of 30.1 inches will push into the great lakes early next week 
before another potential front moves through the region midweek. 


lmz261-362-364-563-150930-
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 rock island passage to sturgeon bay wi-
850 pm cdt fri aug 14 2026

sturgeon bay wi to point betsie mi north...

.rest of tonight...northeast winds 10 to 15 kt becoming east.
waves 1 to 3 ft. 
.saturday...east winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.saturday night...east winds 10 to 20 kt veering to southwest
10 to 15 kt. chance of showers overnight. waves 1 to 3 ft. 
.sunday...west winds 10 to 20 kt becoming northwest 15 to 25 kt.
chance of showers in the morning. waves 1 to 2 ft building to
2 to 4 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
20 kt. waves 2 to 4 ft. 
.monday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 1 to 2 ft. 
.monday night...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt. waves
1 to 3 ft. 
.wednesday...north winds 15 to 25 kt becoming northwest to 30 kt.
chance of showers. waves 1 to 3 ft.  

$$

fzus63 kmkx 150150
glflm 
expires:202608150930;;205495

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
850 pm cdt fri aug 14 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...

periods of showers and storms are expected to cross the southern 
half of lake michigan through sunday as a front remains stalled 
south over illinois and indiana. low pressure of 29.8 inches over 
kansas will track to the northeast and east toward southern lake 
michigan tonight into saturday. this low should help to bump up 
winds and waves across the southern two thirds of lake michigan 
into saturday. beyond this system, a broad ridge of high pressure 
of 30.1 inches will push into the great lakes early next week 
before another potential front moves through the region midweek. 


lmz366-565-567-669-868-870-150930-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
850 pm cdt fri aug 14 2026

sturgeon bay wi to point betsie mi south to port washington wi to
whitehall mi...

.rest of tonight...northeast winds 10 to 20 kt becoming east.
slight chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds 10 to 20 kt. slight chance of
showers. waves 3 to 5 ft. 
.saturday night...southeast winds 10 to 20 kt veering to west
10 to 15 kt. chance of showers overnight. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. waves 1 to
3 ft. 
.sunday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 20 kt becoming west. waves 1 to 3 ft.
.monday night...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.wednesday...northwest winds 15 to 25 kt becoming north to 30 kt.
chance of showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 150150
glflm 
expires:202608150930;;205496

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
850 pm cdt fri aug 14 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...

periods of showers and storms are expected to cross the southern 
half of lake michigan through sunday as a front remains stalled 
south over illinois and indiana. low pressure of 29.8 inches over 
kansas will track to the northeast and east toward southern lake 
michigan tonight into saturday. this low should help to bump up 
winds and waves across the southern two thirds of lake michigan 
into saturday. beyond this system, a broad ridge of high pressure 
of 30.1 inches will push into the great lakes early next week 
before another potential front moves through the region midweek. 


lmz080-671-673-675-777-779-872-874-876-878-150930-
lake michigan from michigan city in to st. joseph mi 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 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-
850 pm cdt fri aug 14 2026

port washington wi to whitehall mi south...

.rest of tonight...north winds 10 to 20 kt veering to southeast.
slight chance of showers and thunderstorms overnight. waves 2 to
4 ft. 
.saturday...southeast winds 10 to 20 kt. chance of showers and
thunderstorms. waves 3 to 5 ft. 
.saturday night...southeast winds 10 to 15 kt veering to west.
chance of showers overnight. waves 2 to 4 ft subsiding to 1 to
3 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. chance of
showers. waves 1 to 3 ft. 
.sunday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.monday night...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.wednesday...northwest winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 3 to 5 ft.  

$$

fzus63 kmqt 150801
glfls 
expires:202608152000;;221023

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat aug 15 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...

30.2 inch high pressure just north and east of lake superior 
eventually gives way to a 29.9 inch low by tonight as the 
aforementioned high moves east towards new england. this low deepens 
to 29.7 inches as it reaches quebec sunday night. into monday, a 
30.1 inch high over the plains weakens to 30.0 inches as it slides 
generally south of the great lakes tuesday. meanwhile tuesday, a 
29.4 inch low over hudson bay extends a 29.8 inch trough over lake 
superior. wednesday into thursday morning, ridging of 30.1 inches 
moves over the upper great lakes from the plains.




lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sat aug 15 2026 /301 am cdt sat aug 15 2026/

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 10 to 20 knots backing northeast in the
afternoon. a chance of showers. a slight chance of thunderstorms
by mid afternoon. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight, then backing west late. a chance of showers and a
slight chance of thunderstorms through midnight. waves calm to
2 feet. 
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a chance of showers. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots veering north. a chance of
showers. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202608152000;;221024

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat aug 15 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...

30.2 inch high pressure just north and east of lake superior 
eventually gives way to a 29.9 inch low by tonight as the 
aforementioned high moves east towards new england. this low deepens 
to 29.7 inches as it reaches quebec sunday night. into monday, a 
30.1 inch high over the plains weakens to 30.0 inches as it slides 
generally south of the great lakes tuesday. meanwhile tuesday, a 
29.4 inch low over hudson bay extends a 29.8 inch trough over lake 
superior. wednesday into thursday morning, ridging of 30.1 inches 
moves over the upper great lakes from the plains.




lsz263-152000-
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 sat aug 15 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots increasing to 10 to 20 knots
late. a chance of showers. a slight chance of thunderstorms by
mid afternoon. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then backing west late. a slight chance
of thunderstorms through midnight. a chance of showers. waves
calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a chance of showers. waves subsiding to calm to 2 feet.
.tuesday...west winds 5 to 15 knots becoming north 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202608152000;;221025

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat aug 15 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...

30.2 inch high pressure just north and east of lake superior 
eventually gives way to a 29.9 inch low by tonight as the 
aforementioned high moves east towards new england. this low deepens 
to 29.7 inches as it reaches quebec sunday night. into monday, a 
30.1 inch high over the plains weakens to 30.0 inches as it slides 
generally south of the great lakes tuesday. meanwhile tuesday, a 
29.4 inch low over hudson bay extends a 29.8 inch trough over lake 
superior. wednesday into thursday morning, ridging of 30.1 inches 
moves over the upper great lakes from the plains.




lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt sat aug 15 2026

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

$$

fzus63 kmqt 150801
glfls 
expires:202608152000;;221026

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat aug 15 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...

30.2 inch high pressure just north and east of lake superior 
eventually gives way to a 29.9 inch low by tonight as the 
aforementioned high moves east towards new england. this low deepens 
to 29.7 inches as it reaches quebec sunday night. into monday, a 
30.1 inch high over the plains weakens to 30.0 inches as it slides 
generally south of the great lakes tuesday. meanwhile tuesday, a 
29.4 inch low over hudson bay extends a 29.8 inch trough over lake 
superior. wednesday into thursday morning, ridging of 30.1 inches 
moves over the upper great lakes from the plains.




lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt sat aug 15 2026

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

$$

fzus63 kmqt 150801
glfls 
expires:202608152000;;221027

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat aug 15 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...

30.2 inch high pressure just north and east of lake superior 
eventually gives way to a 29.9 inch low by tonight as the 
aforementioned high moves east towards new england. this low deepens 
to 29.7 inches as it reaches quebec sunday night. into monday, a 
30.1 inch high over the plains weakens to 30.0 inches as it slides 
generally south of the great lakes tuesday. meanwhile tuesday, a 
29.4 inch low over hudson bay extends a 29.8 inch trough over lake 
superior. wednesday into thursday morning, ridging of 30.1 inches 
moves over the upper great lakes from the plains.




lsz266-152000-
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 sat aug 15 2026

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

$$

fzus63 kmqt 150801
glfls 
expires:202608152000;;221028

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat aug 15 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...

30.2 inch high pressure just north and east of lake superior 
eventually gives way to a 29.9 inch low by tonight as the 
aforementioned high moves east towards new england. this low deepens 
to 29.7 inches as it reaches quebec sunday night. into monday, a 
30.1 inch high over the plains weakens to 30.0 inches as it slides 
generally south of the great lakes tuesday. meanwhile tuesday, a 
29.4 inch low over hudson bay extends a 29.8 inch trough over lake 
superior. wednesday into thursday morning, ridging of 30.1 inches 
moves over the upper great lakes from the plains.




lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt sat aug 15 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south late. a
slight chance of showers through midnight, then showers likely
and a chance of thunderstorms after midnight. waves building to
1 to 3 feet. 
.sunday...west winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. a chance of showers and a slight chance of thunderstorms
through early afternoon. waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots veering north. a chance of
showers. waves calm to 2 feet. 
.wednesday...north winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 

$$