National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 050753
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
253 AM CDT Sat Sep 5 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

Light winds over Lake Michigan will shift east-northeasterly early this morning as a cold front gradually slides southward. Areas of fog may form over central and southern Lake Michigan after the frontal passage, clearing out later this morning.

High pressure around 30.1 inches builds over the Great Lakes from Ontario through the weekend, bringing modest northeast winds for central and southern portions of Lake Michigan today. Winds eventually weaken and become more light and variable for Sunday and Monday as the high pressure system settles closer to the region.

LMZ261-362-364-366-563-565-567-868-051515
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
253 AM CDT Sat Sep 5 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

TODAY
East winds 10 to 15 kt becoming northeast 10 to 20 kt. Patchy dense fog this morning. Waves 1 to 3 ft.

TONIGHT
Northeast winds 10 to 20 kt becoming east 10 to 15 kt after midnight, then diminishing to 5 to 10 kt late. Waves 2 to 4 ft.

SUNDAY
East winds 5 to 10 kt becoming northeast. Waves 1 to 3 ft subsiding to 1 to 2 ft.

SUNDAY NIGHT
East winds 10 to 15 kt becoming southeast. Waves 1 to 2 ft.

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

MONDAY NIGHT
Southeast winds 5 to 10 kt increasing to 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft.

TUESDAY
South winds 15 to 25 kt increasing to 30 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft.

WEDNESDAY
Southwest gales to 35 kt becoming west. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.

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LMZ080-669-671-673-675-777-779-870-872-874-876-878-051515
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
253 AM CDT Sat Sep 5 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TODAY
Northeast winds 10 to 15 kt becoming north 10 to 20 kt. Patchy dense fog this morning. Waves 1 to 3 ft.

TONIGHT
North winds 10 to 20 kt becoming east 10 to 15 kt. Waves 2 to 4 ft.

SUNDAY
East winds 10 to 15 kt becoming northeast. Waves 2 to 4 ft subsiding to 1 to 2 ft.

SUNDAY NIGHT
Northeast winds 10 to 15 kt becoming southeast. Waves 1 to 3 ft.

MONDAY
Southeast winds 10 to 15 kt. Waves 1 to 2 ft.

MONDAY NIGHT
East winds 10 to 15 kt becoming southeast 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft.

TUESDAY
South winds 15 to 25 kt increasing to 30 kt. Waves 4 to 7 ft occasionally to 9 ft.

WEDNESDAY
Southwest winds to 30 kt becoming west. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.

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LMZ761-051515
MAFOR 0510/ MICHIGAN NORTH 12210 11110 13120 11210 11200. Waves 2 feet or less today. Waves 1 to 3 feet tonight.

MICHIGAN SOUTH 13110 11120 11820 11120 12210. Waves 1 to 3 feet.

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Sheppard

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

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