FZUS63 KMKX 081408 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 908 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 remain over the Ohio Valley today and tonight. Modest south winds will continue today, as weak low pressure around 29.8 inches and an accompanying cold front approaches from Lake Superior and Minnesota. 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. LMZ261-362-364-366-563-565-567-868-082115- 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- 908 AM CDT Wed Jul 8 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TODAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt. Scattered showers and slight chance of thunderstorms late this morning, then chance of showers and thunderstorms this afternoon. Waves 1 to 3 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. Patchy fog. Showers likely with a chance of thunderstorms. Waves 1 to 3 ft. .THURSDAY...North winds 10 to 15 kt increasing to 10 to 20 kt. Patchy fog in the morning. 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. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-082115- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to Mid Lake- 908 AM CDT Wed Jul 8 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TODAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt. Waves 1 to 3 ft. .TONIGHT...South winds 10 to 20 kt becoming southwest 10 to 15 kt. Chance of showers and thunderstorms in the evening, then chance of showers and slight chance of thunderstorms overnight. Patchy fog overnight. Waves 1 to 3 ft. .THURSDAY...Southwest winds 10 to 15 kt veering to north 10 to 20 kt. Chance of showers. Waves 1 to 2 ft. .THURSDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Chance of showers in the evening. Waves 1 to 2 ft. .FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft. .FRIDAY NIGHT...North winds 10 to 20 kt becoming northeast 10 to 15 kt. Waves 2 to 4 ft. .SATURDAY...East winds 5 to 10 kt becoming north 10 to 15 kt. Waves 1 to 2 ft. .SUNDAY...Southeast winds 10 to 15 kt veering to southwest 10 to 20 kt. Waves 1 ft or less. $$ LMZ761-082115- MAFOR 0816/ MICHIGAN NORTH 11520 19526 11510 11526 11416 11616 11806 12810. Waves 2 feet or less. MICHIGAN SOUTH 11410 12420 12410 13510. A chance of showers and thunderstorms this evening, then a chance of showers overnight. A chance of showers Thursday morning. Waves 2 feet or less. $$ Gehring Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes