FZUS63 KMKX 250802 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 302 AM CDT Sat Oct 25 2025 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 30.4 inches will continue to move east of the region today and tonight, with southwest to south winds over the north half of the lake and southeast to east winds to the south. The high will move into southeast Canada into early next week, strengthening to around 30.6 inches. Meanwhile, weak low pressure around 29.8 inches will pass to the southwest of Lake Michigan, bringing a period of gusty east to southeast winds Sunday into Tuesday, becoming more east to northeast by Wednesday. LMZ261-362-364-366-563-565-567-868-251530- 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- 302 AM CDT Sat Oct 25 2025 SHEBOYGAN WI TO PENTWATER MI NORTH... .TODAY...Southwest winds 5 to 10 kt becoming south. Scattered sprinkles this afternoon. Waves 1 ft or less. .TONIGHT...South winds 5 to 10 kt increasing to 10 to 15 kt. Waves 1 to 2 ft. .SUNDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt. Waves 2 to 4 ft. .SUNDAY NIGHT...Southeast winds 10 to 20 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. .MONDAY...Southeast winds 10 to 20 kt becoming east 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft. .MONDAY NIGHT...Southeast winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft. .TUESDAY...Southeast winds 15 to 25 kt becoming east. Waves 6 to 9 ft occasionally to 12 ft. .WEDNESDAY...East winds 10 to 20 kt becoming northeast. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-251530- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to Mid Lake- 302 AM CDT Sat Oct 25 2025 SHEBOYGAN WI TO PENTWATER MI SOUTH... .TODAY...Southeast winds 5 to 10 kt becoming east. Scattered rain showers this afternoon. Waves 1 ft or less. .TONIGHT...East winds 10 to 15 kt becoming southeast. Scattered sprinkles in the evening. Waves 1 to 3 ft. .SUNDAY...Southeastwinds 10 to 20 kt becoming east. Waves 3 to 5 ft. .SUNDAY NIGHT...East winds 15 to 25 kt becoming southeast. Waves 5 to 8 ft occasionally to 10 ft. .MONDAY...East winds 15 to 25 kt. Waves 5 to 8 ft occasionally to 10 ft. .MONDAY NIGHT...East winds to 30 kt. Waves 8 to 11 ft occasionally to 14 ft. .TUESDAY...East winds to 30 kt. Waves 8 to 11 ft occasionally to 14 ft. .WEDNESDAY...East winds to 30 kt becoming northeast 15 to 25 kt. Waves 7 to 10 ft occasionally to 13 ft. $$ LMZ761-251530- MAFOR 2510/ MICHIGAN NORTH 11500 12400 11410 12400 12410. Waves 1 foot or less. MICHIGAN SOUTH 13300 11310 11200 11210 12310. 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