fzus63 kmkx 181939
glflm 
expires:202509190315;;207299

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt thu sep 18 2025

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...

light to modest northeast winds over the northern half of the 
lake will gradually expand into the southern half of the lake this
afternoon with the passage of a weak backdoor cold front. light 
to modest northeast winds are then expected tonight becoming 
easterly on friday. breezy east to southeast winds will then 
prevail friday night through saturday morning as canadian high 
pressure strengthens to around 30.4 inches as it moves into the
lower great lakes and southern quebec, and as low pressure around
29.9 inches moves from the eastern dakotas into minnesota. 
intermittent showers and thunderstorms are expected friday night 
through sunday.


lmz261-362-364-366-563-565-567-868-190315-
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-
239 pm cdt thu sep 18 2025

sheboygan wi to pentwater mi north...

.tonight...north winds 10 to 15 kt becoming east. waves 1 to
3 ft. 
.friday...east winds 10 to 20 kt becoming northeast. waves 2 to
4 ft. 
.friday night...east winds 15 to 25 kt becoming southeast. waves
4 to 6 ft occasionally to 8 ft. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...southeast winds 15 to 25 kt becoming south
10 to 20 kt. chance of showers in the evening, then chance of
showers and thunderstorms overnight. waves 2 to 4 ft. 
.sunday...south winds 10 to 20 kt. chance of showers. waves 2 to
4 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest.
chance of showers. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt. chance of showers. waves
1 to 3 ft. 
.tuesday...northeast winds 10 to 15 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 181939
glflm 
expires:202509190315;;207300

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt thu sep 18 2025

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...

light to modest northeast winds over the northern half of the 
lake will gradually expand into the southern half of the lake this
afternoon with the passage of a weak backdoor cold front. light 
to modest northeast winds are then expected tonight becoming 
easterly on friday. breezy east to southeast winds will then 
prevail friday night through saturday morning as canadian high 
pressure strengthens to around 30.4 inches as it moves into the
lower great lakes and southern quebec, and as low pressure around
29.9 inches moves from the eastern dakotas into minnesota. 
intermittent showers and thunderstorms are expected friday night 
through sunday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190315-
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-
239 pm cdt thu sep 18 2025

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 15 kt becoming east. waves 1 to
3 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft. 
.friday night...northeast winds 10 to 15 kt becoming east 15 to
25 kt late in the evening, then becoming southeast after midnight
becoming southeast 15 to 25 kt late. chance of showers overnight.
waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday...southeast winds 10 to 20 kt. chance of showers. waves
4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.saturday night...southeast winds 10 to 15 kt increasing to 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.sunday...south winds 10 to 20 kt. chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. waves 2 to 4 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest.
showers likely. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt becoming south. chance of
showers and thunderstorms. waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt backing to east. waves 1 to
3 ft.  

$$