fzus63 kmkx 010203
glflm 
expires:202605010930;;811504

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 pm cdt thu apr 30 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...

high pressure around 30.2 inches continues to sit over central 
canada through the end of the week and will bring light and 
varying winds across lake michigan through friday. high pressure 
begins to work its way southeastward tracking across lake michigan
overnight friday through the day saturday. will begin to see more
southerly winds develop saturday night and pick up into sunday as
the high pressure continues to track southward while low pressure
around 29.4 inches treks across ontario. this looks to drag a 
cold front week cold front across the lake later sunday turning 
winds more westerly briefly, before another low pressure around 
29.1 inches develops right behind it for monday. expecting a 
stronger cold front to move across the lake through the day 
monday and turn winds north-northwesterly overnight into tuesday.


lmz261-362-364-366-563-565-567-868-010930-
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-
903 pm cdt thu apr 30 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northwest winds 10 to 15 kt becoming north.
scattered rain showers through early evening, then isolated rain
showers overnight. waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt becoming northwest 10 to 20 kt.
isolated rain showers in the afternoon. waves 1 to 3 ft. 
.friday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.saturday...northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. waves 1 to 2 ft. 
.saturday night...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.sunday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain showers in the morning. waves 3 to 5 ft building
to 4 to 6 ft occasionally to 8 ft. 
.sunday night...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.monday...southwest winds to 30 kt. chance of rain showers. waves
4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally
to 12 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmkx 010203
glflm 
expires:202605010930;;811505

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 pm cdt thu apr 30 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...

high pressure around 30.2 inches continues to sit over central 
canada through the end of the week and will bring light and 
varying winds across lake michigan through friday. high pressure 
begins to work its way southeastward tracking across lake michigan
overnight friday through the day saturday. will begin to see more
southerly winds develop saturday night and pick up into sunday as
the high pressure continues to track southward while low pressure
around 29.4 inches treks across ontario. this looks to drag a 
cold front week cold front across the lake later sunday turning 
winds more westerly briefly, before another low pressure around 
29.1 inches develops right behind it for monday. expecting a 
stronger cold front to move across the lake through the day 
monday and turn winds north-northwesterly overnight into tuesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-010930-
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-
903 pm cdt thu apr 30 2026

sheboygan wi to pentwater mi south...

.rest of tonight...east winds 5 to 10 kt becoming north 10 to
15 kt. numerous rain showers through early evening, then
scattered rain showers overnight. waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.friday night...north winds 10 to 20 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...north winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.saturday night...south winds 10 to 15 kt becoming southwest
10 to 20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.sunday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday night...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.monday...southwest winds 15 to 25 kt increasing to 30 kt. waves
3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.tuesday...northwest winds 10 to 15 kt veering to northeast.
chance of rain showers. waves 2 to 4 ft subsiding to 1 to 3 ft.  

$$