FZUS53 KGRB 210756 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 256 AM CDT Thu May 21 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-211000- 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- 256 AM CDT Thu May 21 2026 .REST OF THE NIGHT...NE wind 10 to 15 kts. Waves 2 ft or less. Clear. .THURSDAY...NE wind 10 to 15 kts. Waves 2 ft or less. Partly sunny. .THURSDAY NIGHT...E wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy in the evening then becoming mostly cloudy. .FRIDAY...E wind 10 to 15 kts backing NE 15 to 25 kts early in the afternoon. Waves 2 ft or less building to 2 to 4 ft in the afternoon. Mostly cloudy in the morning then becoming mostly sunny. A Small Craft Advisory may be needed. $$ LMZ541-211000- Rock Island Passage to Sturgeon Bay WI- 256 AM CDT Thu May 21 2026 .REST OF THE NIGHT...NE wind 10 to 15 kts. Waves 2 ft or less. Clear. .THURSDAY...NE wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy. .THURSDAY NIGHT...NE wind 10 to 15 kts veering E in the late evening and overnight. Waves 1 to 3 ft. Mostly clear in the evening then becoming mostly cloudy. .FRIDAY...E wind 10 to 15 kts backing NE 15 to 25 kts early in the afternoon. Waves 1 to 3 ft building to 3 to 5 ft in the afternoon. Mostly cloudy in the morning then becoming mostly sunny. A Small Craft Advisory may be needed. $$ LMZ542-543-211000- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 256 AM CDT Thu May 21 2026 .REST OF THE NIGHT...NE wind 10 to 15 kts. Waves 1 to 3 ft. Mostly clear. .THURSDAY...NE wind 10 to 15 kts. Waves 1 to 3 ft. Partly cloudy in the morning then becoming mostly cloudy. .THURSDAY NIGHT...NE wind 10 to 15 kts veering E in the late evening and overnight. Waves 1 to 3 ft. Partly cloudy in the evening then becoming mostly cloudy. .FRIDAY...NE wind 10 to 20 kts. Waves 1 to 3 ft building to 2 to 4 ft in the afternoon. Partly sunny. $$ See Lake Michigan Open Lake Forecast for Saturday through Monday. Wave height forecast is for ice free areas.