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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 231934
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
234 PM CDT Fri May 23 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

High pressure of 30.4 inches over Hudson Bay in Canada this afternoon will gradually build southward into the Great Lakes region through this weekend. Breezy northwest winds will linger in advance of the high through this afternoon, particularly across eastern portions of the lake. Winds will become lighter tonight, with generally light northerly winds then expected over the weekend as the high moves overhead. East to northeast winds are expected to pick up a little early next week as the high shifts eastward ahead of an approaching low pressure system.

LMZ261-362-364-366-563-565-567-868-240315
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
234 PM CDT Fri May 23 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

TONIGHT
North winds 10 to 20 kt becoming northwest. Waves 1 to 3 ft.

SATURDAY
Northwest winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 1 to 3 ft.

SATURDAY NIGHT
Northwest winds 10 to 15 kt. Waves 1 to 2 ft.

SUNDAY
Northwest winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft.

SUNDAY NIGHT
North winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 ft or less.

MONDAY
North winds 5 to 10 kt increasing to 10 to 15 kt. Waves 1 to 2 ft.

MONDAY NIGHT
Northeast winds 10 to 15 kt becoming east 5 to 10 kt. Waves 1 to 2 ft.

TUESDAY
East winds 10 to 15 kt becoming northeast 10 to 20 kt. Waves 1 to 3 ft.

WEDNESDAY
Northeast winds 10 to 15 kt. Waves 1 to 2 ft.

LMZ080-669-671-673-675-777-779-870-872-874-876-878-240315
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
234 PM CDT Fri May 23 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TONIGHT
Northeast winds 10 to 15 kt becoming north. Waves 1 to 3 ft.

SATURDAY
North winds 10 to 15 kt becoming northeast. Waves 1 to 2 ft.

SATURDAY NIGHT
North winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft.

SUNDAY
North winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 ft or less building to 1 to 3 ft.

SUNDAY NIGHT
North winds 10 to 15 kt becoming northeast 5 to 10 kt. Waves 1 to 3 ft.

MONDAY
Northeast winds 5 to 10 kt becoming north 10 to 15 kt. Waves 1 to 2 ft.

MONDAY NIGHT
Northeast winds 10 to 15 kt becoming east. Waves 1 to 3 ft.

TUESDAY
East winds 10 to 20 kt becoming northeast. Waves 2 to 4 ft.

WEDNESDAY
Northeast winds 10 to 15 kt becoming north 10 to 20 kt. Waves 1 to 3 ft.

LMZ761-240315
MAFOR 2322/ MICHIGAN NORTH 11830 14720 13710. Waves 1 to 3 feet tonight. Waves 2 feet or less Saturday.

MICHIGAN SOUTH 11120 15810 11810. Waves 1 to 3 feet subsiding to 1 foot or less tonight. Waves 2 feet or less Saturday.

DDV

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

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