FZUS53 KGRB 201621 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1121 AM CDT Fri Mar 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-202200- 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- 1121 AM CDT Fri Mar 20 2026 .THIS AFTERNOON...N wind 5 to 10 kts. Waves 2 ft or less. Partly cloudy. .TONIGHT...NE wind 5 to 10 kts veering E after midnight. Waves 2 ft or less. A slight chance of light freezing rain after midnight. .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. $$ LMZ541-202200- Rock Island Passage to Sturgeon Bay WI- 1121 AM CDT Fri Mar 20 2026 .THIS AFTERNOON...N wind 5 to 10 kts. Waves 1 to 3 ft. Partly cloudy. .TONIGHT...N wind 5 to 10 kts veering NE after midnight. Waves 2 ft or less. A slight chance of light freezing rain after midnight. .SATURDAY...S wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy. .SATURDAY NIGHT...S wind 10 to 15 kts backing NE in the late evening and overnight. Waves 1 to 3 ft. A chance of light rain. $$ LMZ542-543-202200- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 1121 AM CDT Fri Mar 20 2026 .THIS AFTERNOON...N wind 5 to 10 kts. Waves 2 ft or less. Mostly sunny during the morning then becoming partly cloudy. .TONIGHT...NE wind 5 to 10 kts veering E after midnight. Waves 2 ft or less. Partly cloudy in the evening then becoming 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.