FZUS63 KMKX 080816 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 316 AM CDT Wed Jul 8 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 30.1 inches will shift southeast into the Ohio Valley today. Modest south winds will continue today, as weak low pressure around 29.8 inches and an accompanying cold front approaches from the Northern Great Plains. Modest southwest winds tonight will become north behind the frontal passage Thursday into Thursday night. Winds will become north to northeast on Friday, as high pressure around 30.1 inches builds into the the region. The high should continue to bring light to modest winds for the weekend. LMZ261-362-364-366-563-565-567-868-081530- 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- 316 AM CDT Wed Jul 8 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .TODAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt. Chance of showers and slight chance of thunderstorms this morning, then chance of showers and thunderstorms this afternoon. Waves 1 to 2 ft. .TONIGHT...Southwest winds 10 to 20 kt diminishing to 10 to 15 kt late in the evening, then veering to northwest 5 to 10 kt after midnight becoming north late. Showers with a chance of thunderstorms in the evening, then showers likely with slight chance of thunderstorms overnight. Waves 1 to 3 ft. .THURSDAY...North winds 10 to 15 kt increasing to 10 to 20 kt. Chance of showers in the morning. Waves 1 to 2 ft. .THURSDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft. .FRIDAY...Northeast winds 10 to 15 kt becoming north 15 to 25 kt in the afternoon. Waves 1 to 2 ft building to 1 to 3 ft. .FRIDAY NIGHT...Northeast winds 10 to 20 kt becoming east 5 to 10 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft. .SATURDAY...Southeast winds 5 to 10 kt becoming southwest 10 to 15 kt. Waves 1 ft or less. .SUNDAY...Southwest winds 10 to 20 kt. Waves 1 to 3 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-081530- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan from St. Joseph to South Haven MI 5 NMoffshore to Mid Lake- 316 AM CDT Wed Jul 8 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .TODAY...Southwest winds 5 to 10 kt becoming south 10 to 20 kt. Waves 1 to 3 ft. .TONIGHT...South winds 10 to 20 kt becoming southwest 10 to 15 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft. .THURSDAY...Southwest winds 10 to 15 kt veering to north 10 to 20 kt. Chance of showers. Waves 1 to 2 ft. .THURSDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Chance of showers in the evening. Waves 1 to 2 ft. .FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft. .FRIDAY NIGHT...North winds 10 to 20 kt becoming northeast 10 to 15 kt. Waves 2 to 4 ft. .SATURDAY...East winds 5 to 10 kt becoming north 10 to 15 kt. Waves 1 to 2 ft. .SUNDAY...Southeast winds 10 to 15 kt veering to southwest 10 to 20 kt. Waves 1 ft or less. $$ LMZ761-081530- MAFOR 0810/ MICHIGAN NORTH 11410 11510 11520 11510 11520 11416 11616 11806. A chance of thunderstorms this afternoon and evening. Waves 2 feet or less. MICHIGAN SOUTH 11500 11510 11410 12420 12410 11510. A chance of showers and thunderstorms tonight. Waves 2 feet or less. $$ Wood Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes