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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 240856
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
256 AM CST Wed Dec 24 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 and variable winds will continue early this morning as high pressure around 30.5 inches moves east into the southern New England Stats. A weak low pressure trough around 30.0 inches will cross Lake Michigan this evening, and then another high pressure system around 30.5 inches will bring a push of northerly winds down the lake early Thursday morning. Weak low pressure of 29.7 inches will cross Illinois and Indiana on Friday. There is a chance for gales Sunday through Monday as low deepens to 29.3 inches as it crosses Ontario and 29.1 inches over Quebec.

LMZ261-362-364-366-563-565-567-868-241615
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
256 AM CST Wed Dec 24 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

TODAY
East winds 5 to 10 kt becoming south 10 to 20 kt from late morning on. Slight chance of snow this afternoon. Waves 2 to 4 ft.

TONIGHT
South winds 10 to 20 kt veering to north. Patchy drizzle in the evening. Waves 2 to 4 ft.

THURSDAY
North winds 10 to 20 kt becoming east. Waves 4 to 6 ft occasionally to 8 ft.

THURSDAY NIGHT
Southeast winds to 30 kt. Chance of snow, rain and freezing rain overnight. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft.

FRIDAY
Southeast winds to 30 kt diminishing to 15 to 25 kt. Snow and rain with freezing rain likely in the morning, then chance of snow in the afternoon. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.

FRIDAY NIGHT
East winds 10 to 15 kt becoming southeast 5 to 10 kt. Waves 2 to 4 ft subsiding to 1 to 2 ft.

SATURDAY
Southeast winds 10 to 20 kt. Waves 1 to 3 ft building to 2 to 4 ft.

SUNDAY
West gales to 35 kt increasing to gales to 40 kt. Chance of rain and snow. Waves 8 to 11 ft occasionally to 14 ft building to 10 to 14 ft occasionally to 18 ft.

LMZ080-669-671-673-675-777-779-870-872-874-876-878-241615
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
256 AM CST Wed Dec 24 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TODAY
East winds 10 to 15 kt becoming southeast 10 to 20 kt. Waves 2 to 4 ft.

TONIGHT
South winds 10 to 20 kt backing to north. Areas of drizzle in the evening. Waves 2 to 4 ft.

THURSDAY
North winds 15 to 25 kt becoming east 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft.

THURSDAY NIGHT
East winds to 30 kt becoming southeast. Rain likely with a chance of freezing rain overnight. Waves 6 to 9 ft occasionally to 12 ft.

FRIDAY
Southeast winds to 30 kt becoming east 10 to 20 kt in the afternoon. Rain likely in the morning. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.

FRIDAY NIGHT
Northeast winds 5 to 10 kt becoming east. Waves 2 to 4 ft subsiding to 1 to 2 ft.

SATURDAY
Southeast winds 10 to 20 kt. Waves 2 to 4 ft.

SUNDAY
Northwest gales to 40 kt becoming west gales to 45 kt. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft building to 14 to 18 ft occasionally to 23 ft.

LMZ761-241615
MAFOR 2411/ MICHIGAN NORTH 11100 11310 13420 11510 11710 11820. Patchy drizzle this evening. Waves 1 to 3 feet building to 2 to 4 feet today. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.

MICHIGAN SOUTH 11210 11310 12320 11425 11415 11600 11820. Waves 1 to 3 feet building to 2 to 4 feet today. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.

Patterson

Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable

Graphical marine forecasts are available online at: weather.gov/greatlakes