FZUS63 KMKX 261355

GLFLM 



OPEN LAKE FORECAST for Lake Michigan

National Weather Service Milwaukee/Sullivan WI

855 AM CDT Thu Jun 26 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... 



Low pressure of 29.8 inches will approach from the Iowa and

Minnesota border today. A stationary front will stay parked over

the southern end of the lake into this evening with south winds

south of the boundary and north to northeast winds north of the 

boundary. As the surface low approaches tonight, winds will come 

around to southwesterly over the whole lake and some thunderstorms

will be possible over much of the open waters. The low is then 

expected to pass early Friday morning, dragging a cold front over 

the lake. Winds will turn to westerly and northwesterly through 

Friday, becoming northerly Friday night.



LMZ261-362-364-366-563-565-567-868-262115-

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-

855 AM CDT Thu Jun 26 2025



SHEBOYGAN WI TO PENTWATER MI NORTH...



.REST OF TODAY...Northeast winds 15 to 25 kt increasing to 30 kt.

Slight chance of showers. Waves 3 to 5 ft. 

.TONIGHT...Northeast winds to 30 kt veering to southeast 15 to

25 kt. Chance of showers and thunderstorms in the evening, then

showers likely with a chance of thunderstorms overnight. Patchy

fog overnight. Waves 3 to 5 ft. 

.FRIDAY...South winds 10 to 20 kt veering to northwest. Patchy

fog in the morning. Chance of showers in the morning. Waves 2 to

4 ft subsiding to 1 to 3 ft. 

.FRIDAY NIGHT...North winds 10 to 20 kt diminishing to 5 to 10 kt

overnight. Waves 1 to 2 ft. 

.SATURDAY...Northwest winds 5 to 10 kt backing to southwest 10 to

15 kt. Waves 1 ft or less. 

.SATURDAY NIGHT...South winds 5 to 10 kt. Waves 1 ft or less. 

.SUNDAY...South winds 10 to 20 kt. Waves 1 to 3 ft. 

.MONDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.

Chance of showers. Waves 1 to 2 ft.  



$$



LMZ080-669-671-673-675-777-779-870-872-874-876-878-262115-

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-

855 AM CDT Thu Jun 26 2025



SHEBOYGAN WI TO PENTWATER MI SOUTH....REST OF TODAY...West winds 10 to 15 kt backing to east. Slight

chance of showers and thunderstorms. Waves 1 to 2 ft. 

.TONIGHT...East winds 10 to 15 kt veering to southwest. Chance of

showers and thunderstorms. Waves 1 to 3 ft. 

.FRIDAY...Southwest winds 10 to 20 kt becoming west 10 to 15 kt.

Chance of showers in the morning, then chance of thunderstorms in

the afternoon. Waves 1 to 3 ft. 

.FRIDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to

10 kt. Chance of showers in the evening. Waves 1 to 2 ft. 

.SATURDAY...North winds 5 to 10 kt becoming northeast 10 to

15 kt. Waves 1 ft or less. 

.SATURDAY NIGHT...Southeast winds 5 to 10 kt becoming south.

Waves 1 ft or less. 

.SUNDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.

Waves 1 to 3 ft. 

.MONDAY...Southwest winds 10 to 15 kt becoming west. Chance of

showers and thunderstorms. Waves 1 to 2 ft.  



$$



LMZ761-262115-

MAFOR 2616/

MICHIGAN NORTH 12130 11140 11230 11246 11336 11420 11520. A

chance of thunderstorms tonight. Waves 2 to 4 feet this

afternoon. Waves 3 to 5 feet tonight. Waves 2 to 4 feet subsiding

to 1 to 3 feet Friday morning. 



MICHIGAN SOUTH 11710 12210 11310 12410 12520. A chance of showers

and thunderstorms tonight. A chance of showers Friday morning.

Waves 2 feet or less this afternoon and tonight. Waves 1 to 3

feet Friday morning. 



$$





Boxell



Experimental modernized open lake forecast is available online at

weather.gov/mkx/glftable



Graphical marine forecasts are available online at:

weather.gov/greatlakes

