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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 111456
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
856 AM CST Thu Dec 11 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

Northwest winds will continue to diminish today as high pressure around 30.1 inches moves in from the northwest. A period of west to northwest gales may return Friday night through Saturday night as a strong Arctic cold front moves through the region. Heavy freezing spray will likely develop during this period as the colder airmass moves in. Strong high pressure around 30.8 inches will then move southeast through the region Sunday and to the south early next week. Gusty winds may return early next week behind the exiting high.

LMZ261-362-364-366-563-565-567-868-112215
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
856 AM CST Thu Dec 11 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TODAY
Northwest winds 10 to 20 kt diminishing to 10 to 15 kt. Slight chance of snow showers through mid morning. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.

TONIGHT
Northwest winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.

FRIDAY
Northwest winds 10 to 15 kt becoming southwest 10 to 20 kt. Chance of snow in the afternoon. Waves 1 to 3 ft building to 2 to 4 ft.

FRIDAY NIGHT
West winds to 30 kt increasing to gales to 35 kt. Snow likely in the evening, then chance of snow overnight. Freezing spray overnight. Waves 5 to 8 ft occasionally to 10 ft building to 8 to 11 ft occasionally to 14 ft.

SATURDAY
West gales to 35 kt becoming northwest. Freezing spray. Chance of snow. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft.

SATURDAY NIGHT
Northwest gales to 35 kt increasing to gales to 40 kt. Freezing spray. Chance of snow. Waves 8 to 11 ft occasionally to 14 ft.

SUNDAY
Northwest gales to 35 kt diminishing to 15 to 25 kt. Freezing spray. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft.

MONDAY
Southwest gales to 40 kt becoming west gales to 35 kt. Freezing spray. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft.

LMZ080-669-671-673-675-777-779-870-872-874-876-878-112215
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
856 AM CST Thu Dec 11 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TODAY
Northwest winds 10 to 20 kt becoming west 5 to 10 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.

TONIGHT
West winds 5 to 10 kt veering to east. Slight chance of snow. Waves 1 to 3 ft subsiding to 1 to 2 ft.

FRIDAY
Northeast winds 5 to 10 kt veering to southwest 10 to 15 kt late in the morning, then increasing to 10 to 20 kt early in the afternoon becoming west late. Chance of snow in the afternoon. Waves 1 to 3 ft building to 3 to 5 ft.

FRIDAY NIGHT
West winds to 30 kt increasing to gales to 35 kt. Freezing spray. Chance of snow. Waves 6 to 9 ft occasionally to 12 ft building to 8 to 12 ft occasionally to 16 ft.

SATURDAY
Northwest winds to 30 kt. Heavy freezing spray in the morning, then freezing spray in the afternoon. Chance of snow. Waves 8 to 12 ft occasionally to 16 ft.

SATURDAY NIGHT
Northwest winds to 30 kt increasing to gales to 35 kt. Heavy freezing spray. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft.

SUNDAY
Northwest gales to 35 kt diminishing to 30 kt. Freezing spray. Waves 10 to 14 ft occasionally to 18 ft.

MONDAY
Southwest gales to 40 kt becoming west. Freezing spray. Waves 12 to 16 ft occasionally to 21 ft.

LMZ761-112215
MAFOR 1117/ MICHIGAN NORTH 11720 12710 13700 11710 11610. Waves 2 to 4 feet subsiding to 1 to 3 feet this afternoon. Waves 2 feet or less tonight and Friday morning.

MICHIGAN SOUTH 12610 11600 11700 12200 11100 11400. Waves 2 to 4 feet subsiding to 1 to 3 feet this afternoon. Waves 1 to 3 feet subsiding to 1 foot or less tonight. Waves 1 foot or less Friday morning.

Wagner

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

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