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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 120255
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
855 PM CST Sun Jan 11 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

Broad high pressure around 30.5 inches over the lower Mississippi River Valley will continue to weak and drift south as a low pressure around 29.5 inches over Hudson Bay moves east. Both systems will drive the southwest to west winds over Lake Michigan tonight. Winds will accelerate to around 30 kt at times along a surface trough into late tonight. Winds with then gradually decelerate through the daytime Monday.

Breezy south to southwest winds are expected Tuesday ahead of another low pressure system around 29.3 inches. This low pressure system will track east across Lake Superior Tuesday afternoon, shifting winds to northwesterly Tuesday night. There is potential for north to northwesterly gales behind the associated cold front Wednesday through Wednesday night. Moderate freezing spray may occur with these gales.

LMZ261-362-364-366-563-565-567-868-121015
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 PM CST Sun Jan 11 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TONIGHT
Southwest winds 15 to 25 kt becoming west to 30 kt. Slight chance of snow through early evening, then chance of snow overnight. Waves 3 to 5 ft building to 5 to 8 ft occasionally to 10 ft.

MONDAY
West winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.

MONDAY NIGHT
West winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 3 to 5 ft.

TUESDAY
Southwest winds to 30 kt. Rain likely in the morning, then chance of rain and snow in the afternoon. Waves 5 to 8 ft occasionally to 10 ft.

TUESDAY NIGHT
West winds 15 to 25 kt becoming northwest to 30 kt. Chance of rain in the evening, then chance of snow and rain overnight. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.

WEDNESDAY
North gales to 40 kt. Freezing spray. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft building to 14 to 18 ft occasionally to 23 ft.

WEDNESDAY NIGHT
North gales to 40 kt diminishing to gales to 35 kt. Freezing spray. Waves 14 to 18 ft occasionally to 23 ft subsiding to 10 to 14 ft occasionally to 18 ft.

THURSDAY
North winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft.

FRIDAY
South winds 10 to 20 kt. Chance of snow. Waves 4 to 7 ft occasionally to 9 ft.

LMZ080-669-671-673-675-777-779-870-872-874-876-878-121015
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 PM CST Sun Jan 11 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TONIGHT
Southwest winds 10 to 20 kt increasing to 30 kt. Waves 6 to 9 ft occasionally to 12 ft building to 7 to 10 ft occasionally to 13 ft.

MONDAY
West winds to 30 kt diminishing to 10 to 20 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 6 ft occasionally to 8 ft.

MONDAY NIGHT
West winds 10 to 20 kt becoming southwest 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft.

TUESDAY
Southwest winds to 30 kt. Chance of rain. Waves 7 to 10 ft occasionally to 13 ft.

TUESDAY NIGHT
West winds 15 to 25 kt becoming northwest to 30 kt. Chance of rain in the evening, then chance of rain and snow overnight. Waves 5 to 8 ft occasionally to 10 ft.

WEDNESDAY
Northwest gales to 40 kt becoming north. Snow. Waves 10 to 14 ft occasionally to 18 ft building to 15 to 20 ft occasionally to 26 ft.

WEDNESDAY NIGHT
North gales to 40 kt diminishing to gales to 35 kt. Freezing spray. Chance of snow. Waves 15 to 20 ft occasionally to 26 ft subsiding to 14 to 18 ft occasionally to 23 ft.

THURSDAY
North winds to 30 kt diminishing to 10 to 20 kt. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft occasionally to 12 ft.

FRIDAY
Southwest winds 15 to 25 kt. Snow likely. Waves 5 to 8 ft occasionally to 10 ft.

LMZ761-121015
MAFOR 1205/ MICHIGAN NORTH 11547 11640 11630 13620 12610. Waves 5 to 8 feet overnight. Waves 4 to 7 feet subsiding to 2 to 4 feet Monday. Waves 2 to 4 feet subsiding to 1 to 3 feet Monday evening.

MICHIGAN SOUTH 12540 11640 11630 13620 11520. Waves 5 to 8 feet building to 6 to 9 feet overnight. Waves 5 to 9 feet subsiding to 3 to 6 feet Monday. Waves 3 to 5 feet subsiding to 2 to 4 feet Monday evening.

Patterson

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

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