• CLASSIC IWINDSURF
    Classic myiWindsurfClassic Wind & Weather maps and graphs
Hello Guest
 • 

Classic iWindsurf
kiter? see iKitesurf.com
Grab the iWindsurf Mobile App & Sign On to the New iWindsurf Website
Hi guest · Get your free membership now · Log In ·
MI - north

Human Forecasts
 > Daily Briefing
 > Forecast Blog
 > Extended Disc.

Real-Time Data
 > Dynamic Map
 > Wind Obs Map
 > Radar + Satellite Map
 > Wind Obs Summary

Computer Forecasts
 > Model Tables
 > Wind Vector Fx Map
 > Wind FlowViz Fx Map

More Maps

Other Resources
Wind Graphs
Meteograms

Watches/Warnings
>None Active

New iWindsurf: Select your region for wind observations & forecasts:
North America | Europe | South America | Australia & Oceania | Asia | Africa

fzus63 kdtx 031952
glflh 
expires:202608040400;;569866

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 pm edt mon aug 3 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, 30.00 inches, is firmly established 
across the central great lakes today offering dry weather and 
light winds through mid-week. a weak cold front will move in from
the west and briefly stall out over lake huron wednesday. this 
provides the first opportunity for showers and a few thunderstorms
for the latter half of the week.


lhz361-040400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
352 pm edt mon aug 3 2026

.tonight...light and variable winds becoming southwest 5 to
10 knots after midnight. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots backing to the southeast
in the afternoon. waves 2 feet or less building to 2 to 4 feet
late in the afternoon. 
.tuesday night...light and variable winds. a chance of showers
and thunderstorms after midnight. waves 3 to 5 feet subsiding to
1 to 3 feet after midnight. 
.wednesday...light and variable winds. a chance of showers. waves
2 feet or less. 
.wednesday night...light and variable winds. a chance of showers.
waves 2 feet or less. 
.thursday...light and variable winds becoming south 5 to 10 knots
late in the evening. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots backing to the southeast
early in the evening...then veering to the southwest by midnight.
waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots. a chance of showers by
midnight. waves 2 feet or less. 


$$
fzus63 kdtx 031952
glflh 
expires:202608040400;;569867

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 pm edt mon aug 3 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, 30.00 inches, is firmly established 
across the central great lakes today offering dry weather and 
light winds through mid-week. a weak cold front will move in from
the west and briefly stall out over lake huron wednesday. this 
provides the first opportunity for showers and a few thunderstorms
for the latter half of the week.


lhz362-363-040400-
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-
352 pm edt mon aug 3 2026

.tonight...light and variable winds becoming southeast 5 to
10 knots late in the evening...then veering to the south after
midnight. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots becoming south 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet late in the
afternoon. 
.tuesday night...south winds 15 to 20 knots becoming southwest
5 to 10 knots. waves 3 to 5 feet. 
.wednesday...southwest winds 5 to 10 knots backing to the
southeast early in the afternoon. showers likely in the morning...
then a chance of showers in the afternoon. waves 1 to 3 feet. 
.wednesday night...light and variable winds. a chance of showers.
waves 2 feet or less. 
.thursday...light and variable winds. a chance of showers. waves
2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots.
waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming south 10 to
15 knots . waves 2 feet or less. 


$$
fzus63 kdtx 031952
glflh 
expires:202608040400;;569868

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 pm edt mon aug 3 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, 30.00 inches, is firmly established 
across the central great lakes today offering dry weather and 
light winds through mid-week. a weak cold front will move in from
the west and briefly stall out over lake huron wednesday. this 
provides the first opportunity for showers and a few thunderstorms
for the latter half of the week.


lhz462>464-040400-
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-
352 pm edt mon aug 3 2026

.tonight...light and variable winds becoming south 5 to 10 knots
after midnight. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots becoming southeast 10 to
15 knots late in the afternoon. waves 2 feet or less. 
.tuesday night...south winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots backing to the southeast
early in the afternoon. a chance of showers in the afternoon.
waves 2 feet or less. 
.wednesday night...southeast winds 5 to 10 knots. a chance of
showers. waves 2 feet or less. 
.thursday...south winds 5 to 10 knots becoming light and
variable. showers likely. a chance of thunderstorms late in the
morning. a chance of showers late in the afternoon. waves 2 feet
or less. 
.friday...light and variable winds becoming east 5 to 10 knots
early in the evening...then veering to the south by midnight.
waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots backing to the south .
waves 2 feet or less. 


$$
fzus63 kmkx 031852
glflm 
expires:202608040315;;567877

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
152 pm cdt mon aug 3 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...

30.1 inch high pressure is crossing the open waters this afternoon,
resulting in light and variable winds. winds will trend southerly
tonight into tuesday as the high shifts east and a cold front 
moves into the western great lakes. said front will slowly move 
across lake michigan late tuesday afternoon through wednesday, 
bringing a brief north-northwest wind shift across the open 
waters. periods of showers and storms will accompany the slow- 
moving front, with severe weather appearing unlikely at this time.
winds will trend variable once more wednesday evening through 
thursday, when 1016 mb high pressure is forecast to build back 
into the western great lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 1020 mb high 
pressure lingers off the mid-atlantic coast and 1002 mb low pressure 
stalls over the hudson bay. shower and storm chances return to the 
forecast saturday night into the beginning of next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-040315-
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-
152 pm cdt mon aug 3 2026

sheboygan wi to pentwater mi south...

.tonight...southeast winds 10 to 15 kt becoming south. waves 1 to
2 ft. 
.tuesday...southwest winds 10 to 15 kt becoming south 15 to
25 kt. waves 1 to 3 ft building to 3 to 5 ft. 
.tuesday night...south winds 15 to 25 kt diminishing to 10 to
20 kt late in the evening, then becoming southwest 10 to 15 kt
overnight. chance of showers. waves 3 to 5 ft subsiding to 1 to
3 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south. showers
likely in the morning, then chance of showers in the afternoon.
waves 1 to 3 ft. 
.wednesday night...east winds 5 to 10 kt veering to south.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 1 to 2 ft. 
.thursday...northwest winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers. waves 1 to 2 ft. 
.thursday night...northeast winds 5 to 10 kt backing to west.
waves 1 ft or less. 
.friday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 1 to 2 ft. 
.saturday...southwest winds 10 to 20 kt becoming south. waves
1 to 3 ft.  

$$
fzus63 kmkx 031852
glflm 
expires:202608040315;;567876

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
152 pm cdt mon aug 3 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...

30.1 inch high pressure is crossing the open waters this afternoon,
resulting in light and variable winds. winds will trend southerly
tonight into tuesday as the high shifts east and a cold front 
moves into the western great lakes. said front will slowly move 
across lake michigan late tuesday afternoon through wednesday, 
bringing a brief north-northwest wind shift across the open 
waters. periods of showers and storms will accompany the slow- 
moving front, with severe weather appearing unlikely at this time.
winds will trend variable once more wednesday evening through 
thursday, when 1016 mb high pressure is forecast to build back 
into the western great lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 1020 mb high 
pressure lingers off the mid-atlantic coast and 1002 mb low pressure 
stalls over the hudson bay. shower and storm chances return to the 
forecast saturday night into the beginning of next week.


lmz261-362-364-366-563-565-567-868-040315-
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-
152 pm cdt mon aug 3 2026

sheboygan wi to pentwater mi north...

.tonight...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...southwest winds to 30 kt diminishing to 10 to
20 kt late in the evening, then diminishing to 10 to 15 kt after
midnight becoming northwest late. chance of showers and
thunderstorms in the evening, then chance of showers overnight.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt backing to southwest.
chance of showers in the morning. waves 1 to 3 ft. 
.wednesday night...southeast winds 5 to 10 kt becoming east.
chance of showers overnight. waves 1 ft or less. 
.thursday...east winds 10 to 15 kt veering to southwest 10 to
20 kt. waves 1 to 2 ft. 
.thursday night...south winds 10 to 20 kt becoming southwest.
waves 1 to 2 ft. 
.friday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.saturday...southwest winds 15 to 25 kt increasing to 30 kt.
waves 2 to 4 ft.  

$$
fzus63 kmqt 031957
glfls 
expires:202608040800;;569987

open lake forecast for lake superior
national weather service marquette mi
356 pm edt mon aug 3 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...

ridging of 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz266-040800-
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-
356 pm edt mon aug 3 2026

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

$$
fzus63 kmqt 031957
glfls 
expires:202608040800;;569988

open lake forecast for lake superior
national weather service marquette mi
356 pm edt mon aug 3 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...

ridging of 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz267-040800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
356 pm edt mon aug 3 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then becoming west 5 to 15 knots late.
a chance of showers. waves subsiding to calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots veering west late.
a slight chance of showers through midnight. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...south winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots backing south. waves
subsiding to calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south. a chance
of showers. waves calm to 2 feet. 

$$
fzus63 kmqt 031957
glfls 
expires:202608040800;;569983

open lake forecast for lake superior
national weather service marquette mi
356 pm edt mon aug 3 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...

ridging of 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
356 pm edt mon aug 3 2026 /256 pm cdt mon aug 3 2026/

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots becoming south 15 to
25 knots after midnight, then veering southwest late. a chance of
showers and a slight chance of thunderstorms after midnight.
waves building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing southwest late. waves
subsiding to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves calm to 2 feet.
.thursday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering northwest. a
chance of showers and thunderstorms. waves calm to 2 feet. 

$$
fzus63 kmqt 031957
glfls 
expires:202608040800;;569984

open lake forecast for lake superior
national weather service marquette mi
356 pm edt mon aug 3 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...

ridging of 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz263-040800-
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-
356 pm edt mon aug 3 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southeast winds 10 to 20 knots becoming south 15 to
25 knots after midnight, then veering southwest late. a chance of
showers and a slight chance of thunderstorms after midnight.
waves building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots backing southwest late. a
chance of showers through early afternoon. waves 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 
.wednesday night...south winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.thursday night...southwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.friday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers and thunderstorms. waves calm to
2 feet. 

$$
fzus63 kmqt 031957
glfls 
expires:202608040800;;569985

open lake forecast for lake superior
national weather service marquette mi
356 pm edt mon aug 3 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...

ridging of 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz264-040800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
356 pm edt mon aug 3 2026

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots veering west in the
afternoon, then backing southwest late. a slight chance of
showers and thunderstorms through early afternoon. waves 2 to
4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering west. a chance
of showers. waves calm to 2 feet. 

$$
fzus63 kmqt 031957
glfls 
expires:202608040800;;569986

open lake forecast for lake superior
national weather service marquette mi
356 pm edt mon aug 3 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...

ridging of 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz265-040800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
356 pm edt mon aug 3 2026

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

$$
© Copyright 2026 WeatherFlow, Inc · Contact Us ·