Nearshore Marine Forecast
Issued by NWS Green Bay, WI
Issued by NWS Green Bay, WI
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167 FZUS53 KGRB 181337 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 837 AM CDT Sat Apr 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-181600- 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- 837 AM CDT Sat Apr 18 2026 .TODAY...W wind 10 to 20 kts. Waves 1 to 3 ft. A chance of sprinkles. .TONIGHT...W wind 10 to 20 kts. Waves 1 to 3 ft. Partly cloudy. .SUNDAY...NW wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy. .SUNDAY NIGHT...N wind 5 to 10 kts backing W after midnight. Waves 2 ft or less. Clear. $$ LMZ541-181600- Rock Island Passage to Sturgeon Bay WI- 837 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... .TODAY...W wind 10 to 20 kts. Waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. A chance of sprinkles. .TONIGHT...W wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy in the evening then becoming partly cloudy. .SUNDAY...NW wind 10 to 15 kts veering N early in the afternoon. Waves 2 ft or less. Partly sunny. .SUNDAY NIGHT...N wind 10 to 15 kts backing NW 5 to 10 kts after midnight. Waves 2 ft or less. Clear. $$ LMZ542-543-181600- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 837 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... .TODAY...W wind 15 to 25 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon. A chance of sprinkles. .TONIGHT...W wind 15 to 25 kts decreasing to 10 to 15 kts in the late evening and overnight. Waves 1 to 3 ft. Mostly clear. A Small Craft Advisory may be needed. .SUNDAY...NW wind 10 to 15 kts veering N early in the afternoon. Waves 2 ft or less. A chance of flurries in the morning. A chance of sprinkles. .SUNDAY NIGHT...NE wind 10 to 15 kts backing N 5 to 10 kts after midnight. Waves 2 ft or less. Mostly clear. $$ See Lake Michigan Open Lake Forecast for Monday through Wednesday. Wave height forecast is for ice free areas.