FZUS53 KGRB 201315 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 815 AM CDT Fri Mar 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-201600- Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 815 AM CDT Fri Mar 20 2026 .TODAY...NW wind 5 to 10 kts veering N in the late morning and afternoon. Waves 2 ft or less. Partly cloudy. .TONIGHT...NW wind 5 to 10 kts backing SW in the late evening and overnight. Waves 2 ft or less. Mostly cloudy. .SATURDAY...S wind 5 to 10 kts. Waves 2 ft or less. Mostly cloudy. .SATURDAY NIGHT...SE wind 5 to 10 kts backing N 10 to 15 kts in the late evening and overnight. Waves 2 ft or less. A chance of light rain. $$ LMZ541-201600- Rock Island Passage to Sturgeon Bay WI- 815 AM CDT Fri Mar 20 2026 .TODAY...NW wind 5 to 10 kts veering N early in the afternoon. Waves 1 to 3 ft. Partly cloudy. .TONIGHT...N wind 5 to 10 kts backing SW in the late evening and overnight. Waves 2 ft or less. Mostly cloudy. .SATURDAY...S wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy. .SATURDAY NIGHT...S wind 10 to 15 kts backing NE in the late evening and overnight. Waves 1 to 3 ft. A chance of light rain. $$ LMZ542-543-201600- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 815 AM CDT Fri Mar 20 2026 .TODAY...NW wind 10 to 15 kts veering N 5 to 10 kts in the late morning and afternoon. Waves 1 to 3 ft. Partly sunny. .TONIGHT...N wind 5 to 10 kts backing S in the late evening and overnight. Waves 2 ft or less. Mostly cloudy. .SATURDAY...S wind 10 to 15 kts. Waves 2 to 4 ft. Mostly cloudy. .SATURDAY NIGHT...S wind 10 to 15 kts veering NW, then veering N after midnight. Waves 2 to 4 ft. A chance of light rain after midnight. $$ See Lake Michigan Open Lake Forecast for Sunday through Tuesday. Wave height forecast is for ice free areas.