FZUS63 KMKX 230222 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 922 PM CDT Sat Aug 22 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... Isolated showers and storms will remain possible over the lake tonight into at least early Sunday, with a small chance for an isolated waterspout through tonight. Otherwise, breezy north to northwest winds will persist into Sunday between deepening low pressure around 29.7 inches over the eastern Great Lakes and high pressure of 30.2 inches building in from the northwest. Winds will eventually become lighter by mid-day Monday, persisting into Tuesday as the high moves overhead. Breezy southerly winds will then develop later Tuesday into Wednesday as the high shifts eastward ahead of an approaching low. LMZ261-362-364-366-563-565-567-868-230930- 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- 922 PM CDT Sat Aug 22 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TONIGHT...North winds 15 to 25 kt becoming northwest. Slight chance of waterspouts. Waves 4 to 6 ft occasionally to 8 ft. .SUNDAY...Northwest winds 15 to 25 kt becoming north to 30 kt. Waves 4 to 6 ft occasionally to 8 ft. .SUNDAY NIGHT...North winds to 30 kt becoming northwest 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. .MONDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft. .MONDAY NIGHT...North winds 15 to 25 kt backing to west 5 to 10 kt overnight. Waves 1 to 3 ft subsiding to 1 to 2 ft. .TUESDAY...Southwest winds 10 to 15 kt increasing to 15 to 25 kt in the afternoon. Waves 1 ft or less building to 2 to 4 ft. .TUESDAY NIGHT...South winds 15 to 25 kt diminishing to 10 to 20 kt. Chance of showers. Waves 2 to 4 ft. .WEDNESDAY...Southwest winds 15 to 25 kt becoming south to 30 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...Northwest winds 10 to 20 kt becoming north 15 to 25 kt. Waves 1 to 3 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-230930- 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- 922 PM CDT Sat Aug 22 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TONIGHT...North winds 10 to 20 kt. Slight chance of showers late this evening. Slight chance of waterspouts. Waves 2 to 4 ft building to 3 to 5 ft. .SUNDAY...Northwest winds 15 to 25 kt becoming north. Slight chance of waterspouts in the morning. Waves 4 to 7 ft occasionally to 9 ft. .SUNDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to 15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. .MONDAY...Northwest winds 10 to 20 kt becoming north. Waves 2 to 4 ft. .MONDAY NIGHT...Northeast winds 10 to 15 kt veering to south. Waves 1 to 3 ft. .TUESDAY...South winds 10 to 15 kt increasing to 15 to 25 kt in the afternoon. Waves 1 to 2 ft building to 2 to 4 ft. .TUESDAY NIGHT...South winds 15 to 25 kt becoming southwest 10 to 20 kt. Waves 2 to 4 ft. .WEDNESDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...Northwest winds 10 to 20 kt becoming north. Waves 2 to 4 ft. $$ LMZ761-230930- MAFOR 2304/ MICHIGAN NORTH 11840 13730 12740 12840. Waves 3 to 6 feet. MICHIGAN SOUTH 12820 11720 12730 12830 11820. Waves 1 to 3 feet building to 3 to 5 feet overnight. Waves 3 to 6 feet Sunday. Waves 3 to 5 feet subsiding to 2 to 4 feet Sunday evening. $$ DDV Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes