Station List

National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 031942
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
242 PM CDT Sun May 3 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

A weak cold front is expected to pass over the lake this evening, easing winds for a time before winds return to a southerly direction and become gusty again around dawn on Monday. Winds will then increase Monday morning ahead of another cold front in association with low pressure of 28.9 inches moving across Ontario. A short 6 hour period of Gales is anticipated over the northern third of Lake Michigan between 10am and 4pm CDT. A Gale Warning has been issued. Winds then ease through the afternoon from north to south over the lake as the cold front moves south. Winds behind the front will become northwesterly.

The pressure gradient will then ease over the lake Tuesday through Thursday, with light and persistent west to northwest winds occuring. Light and variable winds may briefly occur at times as various weak surface ridges move across the lake.

LMZ261-362-364-563-040315
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 Rock Island Passage to Sturgeon Bay WI
242 PM CDT Sun May 3 2026

STURGEON BAY WI TO POINT BETSIE MI NORTH...

GALE WARNING IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON

TONIGHT
Southwest winds to 30 kt becoming south 10 to 20 kt. Chance of rain showers and slight chance of thunderstorms. Waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft, then subsiding to 3 to 5 ft.

MONDAY
South winds to 30 kt becoming southwest to 35 kt. Slight chance of rain showers and thunderstorms in the afternoon. Waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft.

MONDAY NIGHT
West winds 10 to 20 kt becoming northwest 10 to 15 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.

TUESDAY
Northwest winds 10 to 20 kt becoming southwest. Waves 1 to 3 ft.

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

WEDNESDAY
West winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 1 to 2 ft.

WEDNESDAY NIGHT
West winds 10 to 15 kt becoming southwest less than 10 kt. Waves 1 to 2 ft.

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

FRIDAY
West winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 1 to 2 ft.

LMZ080-366-565-567-669-671-673-675-777-779-868-870-872-874-876
878-040315
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to Mid Lake
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 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 Pentwater to Manistee MI 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
242 PM CDT Sun May 3 2026

STURGEON BAY WI TO POINT BETSIE MI SOUTH...

TONIGHT
South winds to 30 kt becoming southwest 10 to 20 kt from late evening on. Waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft.

MONDAY
Southwest winds 15 to 25 kt becoming south to 30 kt. Chance of rain showers in the afternoon. Waves 2 to 4 ft building to 5 to 8 ft occasionally to 10 ft.

MONDAY NIGHT
Southwest winds 15 to 25 kt becoming west 10 to 20 kt late in the evening, then becoming northwest 10 to 15 kt overnight. Chance of rain showers. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.

TUESDAY
North winds 10 to 15 kt becoming northeast. Chance of rain showers. Waves 1 to 3 ft.

TUESDAY NIGHT
Northwest winds 10 to 15 kt becoming north 5 to 10 kt. Waves 1 to 2 ft.

WEDNESDAY
North winds 10 to 15 kt becoming northeast. Waves 1 to 3 ft.

WEDNESDAY NIGHT
South winds 5 to 10 kt becoming west. Waves 1 to 2 ft.

THURSDAY
West winds 10 to 15 kt becoming southwest. Waves 1 ft or less.

FRIDAY
West winds 5 to 10 kt becoming south 10 to 15 kt. Waves 1 to 2 ft.

LMZ761-040315
MAFOR 0322/ MICHIGAN NORTH...GALE WARNING IN EFFECT...11540 11520 11510 11420 11430 11440 11550 11540. A chance of rain showers early this evening. A chance of showers Monday afternoon. Waves 5 to 8 feet subsiding to 2 to 4 feet tonight. Waves 3 to 5 feet building to 5 to 9 feet Monday.

MICHIGAN SOUTH 11440 12520 11510 11520 11530 11430 11440. Waves 4 to 7 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet building to 3 to 6 feet Monday.

Gehring

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

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