Great Lakes Forecast
Issued by NWS
Issued by NWS
079 FZUS63 KMKX 011402 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 802 AM CST Sun Nov 1 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 near 30.5 inches will drift southeast into the northeastern United States through this afternoon, maintaining south-southeasterly winds over Lake Michigan. Low pressure near 29.5 inches will develop over eastern Colorado this evening, progressing into the Upper Mississippi River Valley by early Tuesday morning. Winds will steadily become gusty ahead of the low, approaching or exceeding gale force over at least the central third of the lake Tuesday afternoon and evening. Anticipate that headlines will become necessary in later forecasts. Rain will accompany the approaching/passing low Monday through Tuesday night, with a few thunderstorms possibly mixing in. Severe weather is not expected at this time. Winds will remain breezy, though likely below gale levels Wednesday and Wednesday night as 30.1 inch high pressure slowly builds into the Canadian Great Plains. Said high will move into the western Great Lakes through the second half of next week, allowing for westerly and eventually northerly winds by next weekend. LMZ261-362-364-366-563-565-567-868-012230- 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- 802 AM CST Sun Nov 1 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TODAY...South winds 10 to 15 kt becoming southwest. Waves 1 to 3 ft. .TONIGHT...South winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft. .MONDAY...South winds 10 to 20 kt increasing to 30 kt. Chance of showers in the afternoon. Waves 2 to 4 ft building to 6 to 9 ft occasionally to 12 ft. .MONDAY NIGHT...South winds to 30 kt. Showers. Waves 7 to 10 ft occasionally to 13 ft. .TUESDAY...South gales to 40 kt. Showers. Waves 10 to 14 ft occasionally to 18 ft. .TUESDAY NIGHT...South winds to 30 kt diminishing to 15 to 25 kt. Showers. Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft occasionally to 12 ft. .WEDNESDAY...South winds 15 to 25 kt. Showers. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft. .THURSDAY...North winds 10 to 20 kt increasing to 15 to 25 kt. Chance of rain. Waves 3 to 5 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-012230- 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- 802 AM CST Sun Nov 1 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TODAY...South winds 5 to 10 kt becoming southeast. Isolated showers this morning, then isolated sprinkles this afternoon. Waves 1 to 3 ft. .TONIGHT...Southeast winds 5 to 10 kt becoming south 10 to 20 kt. Waves 1 to 3 ft. .MONDAY...South winds 10 to 20 kt increasing to 30 kt. Chance of showers in the afternoon. Waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft. .MONDAY NIGHT...South winds to 30 kt. Chance of showers. Waves 7 to 10 ft occasionally to 13 ft. .TUESDAY...South gales to 40 kt. Chance of showers in the morning, then showers likely in the afternoon. Waves 10 to 14 ft occasionally to 18 ft. .TUESDAY NIGHT...South winds to 30 kt diminishing to 15 to 25 kt. Showers likely. Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft occasionally to 12 ft. .WEDNESDAY...South winds 15 to 25 kt. Showers likely. Waves 4 to 7 ft occasionally to 9 ft. .THURSDAY...West winds 10 to 20 kt becoming northwest. Chance of rain. Waves 3 to 5 ft. $$ LMZ761-012230- MAFOR 0117/ MICHIGAN NORTH 13510 11400 13410 11430. Waves 2 feet or less this afternoon and tonight. Waves 1 to 3 feet building to 2 to 4 feet Monday morning. MICHIGAN SOUTH 11410 11310 11300 12410 12420 11430. Waves 2 feet or less this afternoon. Waves 1 to 3 feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Monday morning. $$ Quigley Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes