FZUS53 KGRB 042118 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 418 PM CDT Tue Aug 4 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-050400- 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- 418 PM CDT Tue Aug 4 2026 .LATE THIS AFTERNOON...SW wind 5 to 10 kts. Waves 2 ft or less. A chance of showers and thunderstorms. .TONIGHT...E wind 5 to 10 kts backing NE in the late evening and overnight. Waves 2 ft or less. A chance of showers and thunderstorms. .WEDNESDAY...NE wind 5 to 10 kts veering E early in the afternoon. Waves 2 ft or less. Mostly cloudy. .WEDNESDAY NIGHT...SE wind 5 to 10 kts veering SW after midnight. Waves 2 ft or less. Partly cloudy. .THURSDAY...SW wind 5 to 10 kts backing S early in the afternoon. Waves 2 ft or less. Partly cloudy in the morning then clearing. $$ LMZ541>543-050400- Rock Island Passage to Sturgeon Bay WI- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 418 PM CDT Tue Aug 4 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .LATE THIS AFTERNOON...S wind 10 to 20 kts. Waves 3 to 5 ft. A chance of showers and thunderstorms. .TONIGHT...SW wind 10 to 15 kts veering N 5 to 10 kts in the late evening and overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft after midnight. A chance of showers and thunderstorms. .WEDNESDAY...N wind 5 to 10 kts veering SE early in the afternoon. Waves 1 to 3 ft. A chance of showers in the morning. .WEDNESDAY NIGHT...SE wind 5 to 10 kts veering SW after midnight. Waves 2 ft or less. Partly cloudy. .THURSDAY...SW wind 5 to 10 kts backing S in the late morning and afternoon. Waves 2 ft or less. Mostly sunny. $$ See Lake Michigan Open Lake Forecast for Friday through Sunday.