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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 060151
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
851 PM CDT Sun Jul 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

High pressure around 30.2 inches will remain in place over the Upper Great Lakes through Tuesday. Expect steady north to northeast winds through Monday and light and variable winds Tuesday. Southwest winds will increase Wednesday as a weak low pressure around 29.7 inches and accompanying cold front approaches from the Northern Plains. Winds will become northerly behind the front passage later Thursday with high pressure building into the the Upper Great Lakes Region through the end of the week.

LMZ261-362-364-366-563-565-567-868-060915
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
851 PM CDT Sun Jul 5 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TONIGHT
Northeast winds 10 to 20 kt diminishing to 5 to 10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.

MONDAY
Northeast winds 5 to 10 kt becoming north 15 to 25 kt. Waves 1 to 2 ft building to 2 to 4 ft.

MONDAY NIGHT
Northeast winds 10 to 20 kt diminishing to 10 to 15 kt late in the evening, then diminishing to 5 to 10 kt after midnight becoming north late. Waves 2 to 4 ft subsiding to 1 to 2 ft.

TUESDAY
Southwest winds 10 to 15 kt. Waves 1 to 2 ft.

TUESDAY NIGHT
Southwest winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft.

WEDNESDAY
Southwest winds 10 to 20 kt. Chance of showers. Waves 1 ft or less building to 1 to 3 ft.

WEDNESDAY NIGHT
Southwest winds 10 to 20 kt becoming west. Showers likely. Waves 2 to 4 ft.

THURSDAY
North winds 10 to 20 kt. Chance of showers. Waves 1 to 3 ft.

FRIDAY
Northeast winds 10 to 20 kt increasing to 15 to 25 kt. Waves 1 to 3 ft.

LMZ080-669-671-673-675-777-779-870-872-874-876-878-060915
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
851 PM CDT Sun Jul 5 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TONIGHT
North winds 10 to 20 kt becoming northeast 10 to 15 kt. Waves 2 to 4 ft.

MONDAY
Northeast winds 10 to 15 kt becoming north 15 to 25 kt. Waves 2 to 4 ft.

MONDAY NIGHT
North winds 10 to 20 kt becoming northeast 5 to 10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.

TUESDAY
North winds 5 to 10 kt becoming northwest. Waves 1 to 3 ft.

TUESDAY NIGHT
Southwest winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 ft or less.

WEDNESDAY
Southwest winds 10 to 15 kt becoming south 10 to 20 kt. Waves 1 ft or less building to 1 to 3 ft.

WEDNESDAY NIGHT
South winds 10 to 20 kt becoming southwest. Chance of showers. Waves 2 to 4 ft.

THURSDAY
West winds 10 to 20 kt becoming northwest. Chance of showers. Waves 1 to 3 ft.

FRIDAY
Northeast winds 10 to 20 kt becoming north 15 to 25 kt. Waves 2 to 4 ft.

LMZ761-060915
MAFOR 0604/ MICHIGAN NORTH 11110 12100 11110 11120 12830 11120. Waves 1 to 3 feet.

MICHIGAN SOUTH 11120 13110 11820 12830 11820. Waves 2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 1 to 3 feet building to 2 to 4 feet Monday. Waves 2 to 4 feet subsiding to 1 to 3 feet Monday evening.

Wagner

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

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