Station List

National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 150805
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
305 AM CDT Mon Jun 15 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

Southwest winds are expected today into tonight ahead of an approaching low. Low pressure is then expected to deepen to 29.5 inches over northern Wisconsin on Tuesday, then move across northern Lake Michigan into the early evening. This will bring breezy southerly winds to the lake on Tuesday shifting west to northwest in the evening and overnight after the low passes. Numerous showers and scattered thunderstorms are forecast over central and southern Lake Michigan on Tuesday.

On Wednesday, low pressure around area 29.2 inches will move into the Upper Mississippi River Valley from the Great Plains. This will bring breezy southeasterly winds to central and southern Lake Michigan Wednesday afternoon and evening, with the low to then move across central Lake Michigan Wednesday night. As low exits into Thursday morning, expect winds to become northwesterly and remain gusty across all open waters into Thursday afternoon, before gradually diminishing. Widespread rain and scattered thunderstorms are forecast Wednesday and Wednesday night.

LMZ261-362-364-366-563-565-567-868-151530
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
305 AM CDT Mon Jun 15 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

TODAY
Southwest winds 10 to 20 kt becoming south 15 to 25 kt. Waves 2 to 4 ft.

TONIGHT
Southwest winds 15 to 25 kt diminishing to 10 to 20 kt. Slight chance of showers in the evening. Waves 2 to 4 ft.

TUESDAY
South winds 10 to 20 kt becoming southwest 15 to 25 kt. Chance of showers. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.

TUESDAY NIGHT
Southwest winds 10 to 20 kt becoming northwest 10 to 15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.

WEDNESDAY
Southwest winds 10 to 15 kt becoming south to 30 kt in the afternoon. Showers likely in the afternoon. Waves 1 to 3 ft building to 3 to 5 ft.

WEDNESDAY NIGHT
Southeast winds to 30 kt becoming northeast. Showers. Waves 4 to 6 ft occasionally to 8 ft.

THURSDAY
North winds to 30 kt becoming west. Chance of showers. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.

FRIDAY
West winds 10 to 20 kt increasing to 15 to 25 kt. Waves 2 to 4 ft.

LMZ080-669-671-673-675-777-779-870-872-874-876-878-151530
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
305 AM CDT Mon Jun 15 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TODAY
West winds 10 to 20 kt becoming southwest. Waves 2 to 4 ft.

TONIGHT
Southwest winds 10 to 20 kt. Waves 2 to 4 ft.

TUESDAY
Southwest winds 15 to 25 kt increasing to 30 kt. Showers likely in the morning, then showers likely with a chance of thunderstorms in the afternoon. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.

TUESDAY NIGHT
West winds to 30 kt diminishing to 10 to 20 kt overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.

WEDNESDAY
Southwest winds 10 to 15 kt becoming southeast to 30 kt in the afternoon. Showers in the afternoon. Waves 1 to 3 ft building to 3 to 5 ft.

WEDNESDAY NIGHT
Southeast gales to 35 kt veering to southwest to 30 kt. Showers with a chance of thunderstorms. Waves 4 to 7 ft occasionally to 9 ft.

THURSDAY
Northwest winds to 30 kt. Waves 5 to 8 ft occasionally to 10 ft.

FRIDAY
Northwest winds 10 to 20 kt becoming west. Waves 2 to 4 ft.

LMZ761-151530
MAFOR 1510/ MICHIGAN NORTH 13520 14530 11520. Waves 1 to 3 feet today. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.

MICHIGAN SOUTH 12610 11510 13520 11510 11520. Waves 1 to 3 feet.

DDV

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

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