FZUS63 KMKX 091926 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 226 PM CDT Thu Jul 9 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... Light to modest north winds over the northern and central portions of the lake will slowly move south into the southern portion of the lake into the early evening. Light to modest southwest winds over the southern portion of the lake will shift northerly during this time. Some fog may develop into tonight with patchy dense fog possible. Winds will remain north to northeast on Friday, as high pressure around 30.0 inches builds into the the region from the north. The high should shift southeast over the weekend, which should continue to bring light to modest winds. LMZ261-362-364-366-563-565-567-868-100315- 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- 226 PM CDT Thu Jul 9 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft. .FRIDAY...North winds 5 to 10 kt increasing to 10 to 20 kt. Waves 1 to 3 ft. .FRIDAY NIGHT...North winds 10 to 20 kt becoming northeast 10 to 15 kt late in the evening, then diminishing to 5 to 10 kt after midnight becoming northeast 5 to 10 kt late. Waves 1 to 3 ft subsiding to 1 to 2 ft. .SATURDAY...East winds 5 to 10 kt becoming northeast 10 to 20 kt in the afternoon. Waves 1 ft or less. .SATURDAY NIGHT...East winds 10 to 15 kt veering to south 5 to 10 kt. Waves 1 ft or less. .SUNDAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 1 to 2 ft. .SUNDAY NIGHT...Southwest winds 10 to 20 kt. Waves 1 to 2 ft. .MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt. Waves 2 to 4 ft. .TUESDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves 3 to 5 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-100315- 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- 226 PM CDT Thu Jul 9 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Scattered showers with isolated thunderstorms this evening, then scattered showers overnight. Patchy fog overnight. Waves 1 to 2 ft. .FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 3 ft. .FRIDAY NIGHT...North winds 10 to 20 kt becoming northeast 10 to 15 kt after midnight, then diminishing to 5 to 10 kt late. Waves 2 to 4 ft subsiding to 1 to 3 ft. .SATURDAY...Northeast winds 5 to 10 kt becoming north 10 to 20 kt in the afternoon. Waves 1 to 2 ft. .SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to 10 kt. Waves 1 to 2 ft. .SUNDAY...East winds 5 to 10 kt becoming northeast. Waves 1 ft or less. .SUNDAY NIGHT...Northeast winds 5 to 10 kt veering to south. Waves 1 ft or less. .MONDAY...South winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft. .TUESDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 1 to 3 ft. $$ LMZ761-100315- MAFOR 0922/ MICHIGAN NORTH 11810 14800 12810 11820. Waves 2 feet or less. MICHIGAN SOUTH 11810 19816 13800 19806 13810 11820. Waves 1 foot or less tonight. Waves 1 to 3 feet Friday. $$ Gehring Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes