National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 060357
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
957 PM CST Thu Nov 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

Northerly gales continue as a tight pressure gradient remains over Lake Michigan between low pressure of 29.5 inches over eastern Canada, and high pressure of 30.3 inches over the northern Great Plains. These gales should linger into Friday as the pressure gradient remains over the lake. A Gale Warning is in effect for all of Lake Michigan until Friday evening. We may see gale conditions end sooner for northern portions of Lake Michigan as the core of the higher gale force winds propagates south down the lake Friday morning.

In addition to the winds, cold air moving into the region tonight into Friday, paired with warmer Lake temps will result in the potential for a waterspout or two for northern sections of the lake tonight and then the middle to southern parts of Lake Michigan Friday.

High pressure then builds over the Upper Great Lakes overnight Friday through the weekend, bringing lighter northwesterly winds.

LMZ261-362-364-366-563-565-567-868-061015
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
957 PM CST Thu Nov 5 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

GALE WARNING IN EFFECT THROUGH FRIDAY AFTERNOON

REST OF TONIGHT
North gales to 35 kt. Chance of waterspouts late this evening, then slight chance of waterspouts overnight. Chance of rain late this evening, then rain likely overnight. Waves 7 to 10 ft occasionally to 13 ft.

FRIDAY
North gales to 35 kt. Slight chance of waterspouts in the morning. Chance of rain in the morning, then slight chance of rain in the afternoon. Waves 7 to 10 ft occasionally to 13 ft.

FRIDAY NIGHT
North winds to 30 kt diminishing to 10 to 20 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.

SATURDAY
North winds 10 to 20 kt becoming northwest. Waves 2 to 4 ft subsiding to 1 to 3 ft.

SATURDAY NIGHT
West winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 3 ft building to 2 to 4 ft.

SUNDAY
West winds 15 to 25 kt. Waves 3 to 5 ft.

SUNDAY NIGHT
Northwest winds 15 to 25 kt diminishing to 10 to 15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.

MONDAY
Southwest winds 15 to 25 kt increasing to 30 kt. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.

TUESDAY
West winds 15 to 25 kt. Waves 3 to 5 ft.

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LMZ080-669-671-673-675-777-779-870-872-874-876-878-061015
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
957 PM CST Thu Nov 5 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

GALE WARNING IN EFFECT THROUGH FRIDAY AFTERNOON

REST OF TONIGHT
North gales to 35 kt. Chance of waterspouts late this evening, then slight chance of waterspouts overnight. Chance of rain. Waves 8 to 11 ft occasionally to 14 ft.

FRIDAY
North gales to 35 kt. Slight chance of waterspouts. Chance of rain. Waves 7 to 10 ft occasionally to 13 ft.

FRIDAY NIGHT
North winds to 30 kt becoming northwest 10 to 20 kt. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft.

SATURDAY
Northwest winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.

SATURDAY NIGHT
West winds 10 to 20 kt. Waves 2 to 4 ft building to 3 to 5 ft.

SUNDAY
West winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft.

SUNDAY NIGHT
West winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 3 to 5 ft.

MONDAY
Southwest winds 10 to 20 kt increasing to 15 to 25 kt. Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft.

TUESDAY
Northwest winds 15 to 25 kt becoming west 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft.

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LMZ761-061015
MAFOR 0605/ MICHIGAN NORTH...GALE WARNING IN EFFECT...11850 12856 13850 11840 11830. A chance of waterspouts late this evening. Waves 6 to 10 feet overnight and Friday. Waves 5 to 8 feet subsiding to 3 to 6 feet Friday evening.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11840 13856 13850 11830. A chance of waterspouts late this evening. Waves 7 to 11 feet overnight. Waves 6 to 10 feet Friday and Friday evening.

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CMiller

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

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