fzus63 kdtx 240139
glflh 
expires:202605240945;;540594

open lake forecast for lake huron
national weather service detroit/pontiac mi
939 pm edt sat may 23 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...low pressure, 29.90 inches, will lift from eastern
lake erie this afternoon into central lake huron tonight,
weakening to 30.10 inches. a weak surface front will cross the
region sunday, providing a chance for showers and isolated
thunderstorms. high pressure will then expand across the eastern
great lakes sunday night into monday.


lhz361-240945-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
939 pm edt sat may 23 2026

.rest of tonight...east winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots early in the morning.
patchy fog after midnight. waves 4 to 6 feet. 
.sunday...northeast winds 5 to 10 knots early in the morning
becoming light and variable. patchy fog. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. waves
occasionally around 8 feet. 
.sunday night...light and variable winds. waves 2 feet or less. 
.monday...light and variable winds becoming north 5 to 10 knots
in the late morning and early afternoon...then veering to the
southeast early in the afternoon. waves 2 feet or less. 
.monday night...light and variable winds becoming south 5 to
10 knots after midnight. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots veering to the west. waves
1 to 3 feet. 
.wednesday...northwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming southwest 5 to
10 knots . waves 2 feet or less. 
.thursday...northeast winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 240139
glflh 
expires:202605240945;;540595

open lake forecast for lake huron
national weather service detroit/pontiac mi
939 pm edt sat may 23 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...low pressure, 29.90 inches, will lift from eastern
lake erie this afternoon into central lake huron tonight,
weakening to 30.10 inches. a weak surface front will cross the
region sunday, providing a chance for showers and isolated
thunderstorms. high pressure will then expand across the eastern
great lakes sunday night into monday.


lhz362-363-240945-
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-
939 pm edt sat may 23 2026

.rest of tonight...northeast winds 15 to 20 knots becoming north
5 to 10 knots. a chance of rain. patchy fog. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.sunday...north winds 5 to 10 knots veering to the south in the
late morning and afternoon. patchy fog. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.sunday night...southeast winds 5 to 10 knots early in the
evening becoming light and variable. waves 2 feet or less. 
.monday...light and variable winds becoming south 10 to 15 knots.
waves 2 feet or less. 
.monday night...south winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots increasing to 10 to 15 knots
late in the morning...then decreasing to 5 to 10 knots late in
the afternoon veering to the southwest late in the evening. waves
1 to 3 feet. 
.wednesday...west winds 5 to 10 knots. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots. waves 1 to 3 feet. 


$$

fzus63 kdtx 240139
glflh 
expires:202605240945;;540596

open lake forecast for lake huron
national weather service detroit/pontiac mi
939 pm edt sat may 23 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...low pressure, 29.90 inches, will lift from eastern
lake erie this afternoon into central lake huron tonight,
weakening to 30.10 inches. a weak surface front will cross the
region sunday, providing a chance for showers and isolated
thunderstorms. high pressure will then expand across the eastern
great lakes sunday night into monday.


lhz462>464-240945-
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-
939 pm edt sat may 23 2026

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


$$

fzus63 kmkx 240205
glflm 
expires:202605240930;;541270

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
905 pm cdt sat may 23 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...

weak low pressure around 29.8 inches will move northeast across
manitoba overnight into sunday. this will pull a weak cold front 
eastward across lake michigan early sunday morning and exit by 
late morning. gusty east winds over far northern portions of the
lake should weaken overnight into sunday morning, with light south
winds elsewhere. south winds should then develop later sunday 
into sunday night.

some fog is expected to develop across the lake overnight into 
sunday morning. will monitor trends for dense fog development. it 
may linger further into sunday and sunday night, as milder air 
moves over and remains over the cooler lake waters.

going into early next week, a broad ridge of high pressure around
30.2 inches is expected to set up over the eastern great lakes, 
ushering in more south to southwest winds across lake michigan. 
a cold front may shift southward across the lake toward the 
middle of next week, as high pressure around 30.3 inches builds
into james bay.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240930-
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-
905 pm cdt sat may 23 2026

sheboygan wi to pentwater mi south...

.rest of tonight...northeast winds 5 to 10 kt veering to south.
patchy fog. slight chance of thunderstorms with isolated rain
showers overnight. waves 1 ft or less. 
.sunday...southeast winds 5 to 10 kt. scattered rain showers and
slight chance of thunderstorms in the morning. patchy fog. waves
1 ft or less. 
.sunday night...south winds 10 to 15 kt diminishing to 5 to
10 kt. patchy fog. waves 1 to 2 ft. 
.monday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.monday night...south winds 10 to 15 kt diminishing to 5 to
10 kt. waves 2 to 4 ft. 
.tuesday...south winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 3 ft. 
.tuesday night...southeast winds 5 to 10 kt. waves 1 to 2 ft
subsiding to 1 ft or less. 
.wednesday...east winds 5 to 10 kt becoming north. waves nearly
calm building to 1 to 2 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. waves 2 to 4 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 240205
glflm 
expires:202605240930;;541269

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
905 pm cdt sat may 23 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...

weak low pressure around 29.8 inches will move northeast across
manitoba overnight into sunday. this will pull a weak cold front 
eastward across lake michigan early sunday morning and exit by 
late morning. gusty east winds over far northern portions of the
lake should weaken overnight into sunday morning, with light south
winds elsewhere. south winds should then develop later sunday 
into sunday night.

some fog is expected to develop across the lake overnight into 
sunday morning. will monitor trends for dense fog development. it 
may linger further into sunday and sunday night, as milder air 
moves over and remains over the cooler lake waters.

going into early next week, a broad ridge of high pressure around
30.2 inches is expected to set up over the eastern great lakes, 
ushering in more south to southwest winds across lake michigan. 
a cold front may shift southward across the lake toward the 
middle of next week, as high pressure around 30.3 inches builds
into james bay.


lmz261-362-364-366-563-565-567-868-240930-
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-
905 pm cdt sat may 23 2026

sheboygan wi to pentwater mi north...

.rest of tonight...east winds to 30 kt diminishing to 10 to 20 kt
after midnight, then becoming southeast 10 to 15 kt late. patchy
fog overnight. isolated rain showers overnight. waves 3 to 5 ft
subsiding to 1 to 2 ft. 
.sunday...southeast winds 5 to 10 kt becoming south 10 to 15 kt.
isolated rain showers in the morning. patchy fog. waves 1 to
2 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest.
patchy fog. waves 1 to 2 ft. 
.monday...south winds 10 to 20 kt. waves 1 to 2 ft building to
2 to 4 ft. 
.monday night...south winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft. 
.tuesday...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.wednesday...northeast winds 5 to 10 kt increasing to 10 to
20 kt. waves 1 to 2 ft. 
.thursday...northeast winds 10 to 20 kt increasing to 30 kt.
waves 2 to 4 ft building to 3 to 5 ft.  

$$

fzus63 kmqt 240201
glfls 
expires:202605240800;;541026

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat may 23 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... 

lake superior is currently between a 30.5 inch high centered over 
eastern quebec and a pair of 29.9 inch lows, one over northern ohio 
and one over northern minnesota. into the evening, the lows weaken 
to remnant 30.0 inch troughs over the upper great lakes while the 
high shifts over nova scotia. sunday, lake superior will be between 
the high, now off the canada coast, and broad 29.6 inch low pressure 
over saskatchewan. a 30.1 inch ridge forms monday over the lower 
great lakes as the low retreats to alberta. monday night, a 29.8 
inch trough will be over northern ontario, extending 29.9 inch 
troughing over the lake. by tuesday night, a 30.2 inch high over the 
western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt sat may 23 2026

.rest of tonight...southeast winds 20 to 30 knots diminishing to
10 to 20 knots late. rain showers likely by midnight, then a
chance of rain showers after midnight. waves 4 to 7 feet
occasionally to 9 feet subsiding to 2 to 4 feet. 
.sunday...southwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.sunday night...south winds 5 to 15 knots veering west late.
waves calm to 2 feet. 
.monday...south winds less than 10 knots becoming southeast 5 to
15 knots by mid afternoon. a slight chance of rain showers by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds less than 10 knots becoming northeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.thursday...northeast winds 5 to 15 knots diminishing to less
than 10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202605240800;;541027

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat may 23 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... 

lake superior is currently between a 30.5 inch high centered over 
eastern quebec and a pair of 29.9 inch lows, one over northern ohio 
and one over northern minnesota. into the evening, the lows weaken 
to remnant 30.0 inch troughs over the upper great lakes while the 
high shifts over nova scotia. sunday, lake superior will be between 
the high, now off the canada coast, and broad 29.6 inch low pressure 
over saskatchewan. a 30.1 inch ridge forms monday over the lower 
great lakes as the low retreats to alberta. monday night, a 29.8 
inch trough will be over northern ontario, extending 29.9 inch 
troughing over the lake. by tuesday night, a 30.2 inch high over the 
western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt sat may 23 2026

.rest of tonight...southeast winds 20 to 30 knots diminishing to
10 to 20 knots. a chance of rain showers. waves 3 to 6 feet
occasionally to 8 feet subsiding to 1 to 3 feet. 
.sunday...south winds 10 to 20 knots veering west in the
afternoon, then becoming south 5 to 15 knots late. waves
subsiding to calm to 2 feet. 
.sunday night...southeast winds 10 to 20 knots veering southwest
after midnight, then veering west late. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. a slight chance of showers and
thunderstorms by mid afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202605240800;;541028

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat may 23 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... 

lake superior is currently between a 30.5 inch high centered over 
eastern quebec and a pair of 29.9 inch lows, one over northern ohio 
and one over northern minnesota. into the evening, the lows weaken 
to remnant 30.0 inch troughs over the upper great lakes while the 
high shifts over nova scotia. sunday, lake superior will be between 
the high, now off the canada coast, and broad 29.6 inch low pressure 
over saskatchewan. a 30.1 inch ridge forms monday over the lower 
great lakes as the low retreats to alberta. monday night, a 29.8 
inch trough will be over northern ontario, extending 29.9 inch 
troughing over the lake. by tuesday night, a 30.2 inch high over the 
western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz266-240800-
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-
1000 pm edt sat may 23 2026

.rest of tonight...southeast winds 20 to 30 knots diminishing to
10 to 20 knots. a chance of rain showers. waves 4 to 7 feet
occasionally to 9 feet subsiding to 2 to 4 feet. 
.sunday...south winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon, then backing southeast late. a slight
chance of rain showers through early afternoon. waves subsiding
to calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then becoming southwest 5 to
15 knots late. waves building to 1 to 3 feet. 
.monday...south winds 5 to 15 knots backing southeast by mid
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202605240800;;541029

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat may 23 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... 

lake superior is currently between a 30.5 inch high centered over 
eastern quebec and a pair of 29.9 inch lows, one over northern ohio 
and one over northern minnesota. into the evening, the lows weaken 
to remnant 30.0 inch troughs over the upper great lakes while the 
high shifts over nova scotia. sunday, lake superior will be between 
the high, now off the canada coast, and broad 29.6 inch low pressure 
over saskatchewan. a 30.1 inch ridge forms monday over the lower 
great lakes as the low retreats to alberta. monday night, a 29.8 
inch trough will be over northern ontario, extending 29.9 inch 
troughing over the lake. by tuesday night, a 30.2 inch high over the 
western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt sat may 23 2026

.rest of tonight...southeast winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. waves 3 to 5 feet occasionally to
7 feet subsiding to calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots veering south in the
afternoon. a slight chance of rain showers through early
afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then veering southwest late. waves
building to 1 to 3 feet. 
.monday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 
.thursday...north winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202605240800;;541024

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat may 23 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... 

lake superior is currently between a 30.5 inch high centered over 
eastern quebec and a pair of 29.9 inch lows, one over northern ohio 
and one over northern minnesota. into the evening, the lows weaken 
to remnant 30.0 inch troughs over the upper great lakes while the 
high shifts over nova scotia. sunday, lake superior will be between 
the high, now off the canada coast, and broad 29.6 inch low pressure 
over saskatchewan. a 30.1 inch ridge forms monday over the lower 
great lakes as the low retreats to alberta. monday night, a 29.8 
inch trough will be over northern ontario, extending 29.9 inch 
troughing over the lake. by tuesday night, a 30.2 inch high over the 
western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sat may 23 2026 /900 pm cdt sat may 23 2026/

.rest of tonight...east winds 5 to 15 knots backing northeast
after midnight, then veering southwest late. a slight chance of
rain showers by midnight. patchy dense fog. waves calm to 2 feet.
.sunday...southwest winds 5 to 15 knots backing south late. a
slight chance of showers and thunderstorms by mid afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.monday...south winds 5 to 15 knots backing east by mid
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202605240800;;541025

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat may 23 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... 

lake superior is currently between a 30.5 inch high centered over 
eastern quebec and a pair of 29.9 inch lows, one over northern ohio 
and one over northern minnesota. into the evening, the lows weaken 
to remnant 30.0 inch troughs over the upper great lakes while the 
high shifts over nova scotia. sunday, lake superior will be between 
the high, now off the canada coast, and broad 29.6 inch low pressure 
over saskatchewan. a 30.1 inch ridge forms monday over the lower 
great lakes as the low retreats to alberta. monday night, a 29.8 
inch trough will be over northern ontario, extending 29.9 inch 
troughing over the lake. by tuesday night, a 30.2 inch high over the 
western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz263-240800-
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-
1000 pm edt sat may 23 2026

.rest of tonight...east winds 10 to 20 knots veering southeast
after midnight, then becoming west 5 to 15 knots late. a chance
of rain showers. waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet. 
.sunday...southwest winds 5 to 15 knots backing south late. waves
subsiding to calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.monday...south winds less than 10 knots becoming southeast 5 to
15 knots by mid afternoon. a slight chance of rain showers by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$