FZUS53 KGRB 122321 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 521 PM CST Fri Dec 12 2025 For waters within five nautical miles of the shore on Lake Michigan LMZ521-522-130900- 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- 521 PM CST Fri Dec 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... .TONIGHT...W wind 15 to 25 kts. A chance of flurries in the evening. Waves 2 to 4 ft. .SATURDAY...W wind 15 to 25 kts. Mostly sunny in the morning then becoming partly cloudy. Waves 2 to 4 ft. .SATURDAY NIGHT...NW wind 15 to 25 kts with gusts to around 30 kts. Partly cloudy. Waves 3 to 5 ft. .SUNDAY...NW wind 15 to 25 kts with gusts to around 30 kts backing W 10 to 15 kts in the afternoon. Mostly sunny in the morning then becoming partly cloudy. Waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. $$ LMZ541-130900- Rock Island Passage to Sturgeon Bay WI- 521 PM CST Fri Dec 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... .TONIGHT...W wind 15 to 25 kts. A chance of light snow and flurries in the evening. Waves 2 to 4 ft. .SATURDAY...W wind 15 to 25 kts. A slight chance of light snow in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft early in the afternoon, then building to 2 to 4 ft late in the afternoon. .SATURDAY NIGHT...NW wind 15 to 25 kts with gusts to around 30 kts. Mostly cloudy. Waves 3 to 5 ft. .SUNDAY...NW wind 15 to 25 kts with gusts to around 30 kts decreasing to 10 to 15 kts in the afternoon. Partly sunny. Waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. $$ LMZ542-543-130900- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 521 PM CST Fri Dec 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... .TONIGHT...W wind 15 to 25 kts with gusts to around 30 kts. A chance of flurries in the evening. Waves 1 to 3 ft building to 2 to 4 ft in the late evening and overnight. .SATURDAY...W wind 15 to 25 kts. A slight chance of light snow in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft in the late morning and afternoon. .SATURDAY NIGHT...NW wind 15 to 25 kts with gusts to around 30 kts. Mostly clear. Waves 2 to 4 ft. .SUNDAY...NW wind 15 to 25 kts. Mostly sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft in the late morning and afternoon. $$ See Lake Michigan Open Lake Forecast for Monday through Wednesday.