fzus63 kmkx 181952
glflm 
expires:202605190330;;784557

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 pm cdt mon may 18 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...

storms and showers are pushing out as winds behind this remain
breezy from the south. these winds will increase slightly 
across the lake late tonight and remain breezy ahead of the cold
frontal passage expected tuesday afternoon as the low pressure 
system around 29.6 inches swings northeast of the lake into 
ontario. a few storms chances across primarily the south part of
the lake late tonight into tuesday morning ahead of the front. 
high pressure around 30.4 inches will push in behind the front 
with light and variable winds taking hold from late wednesday 
into thursday.


lmz261-362-364-366-563-565-567-868-190330-
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-
252 pm cdt mon may 18 2026

sheboygan wi to pentwater mi north...

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

$$

fzus63 kmkx 181952
glflm 
expires:202605190330;;784558

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 pm cdt mon may 18 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...

storms and showers are pushing out as winds behind this remain
breezy from the south. these winds will increase slightly 
across the lake late tonight and remain breezy ahead of the cold
frontal passage expected tuesday afternoon as the low pressure 
system around 29.6 inches swings northeast of the lake into 
ontario. a few storms chances across primarily the south part of
the lake late tonight into tuesday morning ahead of the front. 
high pressure around 30.4 inches will push in behind the front 
with light and variable winds taking hold from late wednesday 
into thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190330-
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-
252 pm cdt mon may 18 2026

sheboygan wi to pentwater mi south...

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

$$