FZUS53 KGRB 120802 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 202 AM CST Fri Dec 12 2025 For waters within five nautical miles of the shore on Lake Michigan LMZ521-522-121400- 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- 202 AM CST Fri Dec 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH LATE SATURDAY NIGHT... .EARLY IN THE MORNING...NW wind around 5 kts. Mostly cloudy. Waves 2 ft or less. .TODAY...W wind 5 to 10 kts backing SW 10 to 20 kts in the afternoon. Light snow likely in the afternoon. Waves 1 to 3 ft. .TONIGHT...W wind 15 to 25 kts with gusts to around 30 kts. Mostly cloudy in the evening then becoming partly cloudy. Waves 3 to 5 ft. .SATURDAY...W wind 15 to 25 kts with gusts to around 30 kts. Mostly sunny in the morning then becoming partly cloudy. Waves 3 to 5 ft. .SATURDAY NIGHT...NW wind to around 30 kts. Partly cloudy. Waves 3 to 5 ft. $$ LMZ541-121400- Rock Island Passage to Sturgeon Bay WI- 202 AM CST Fri Dec 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH LATE SATURDAY NIGHT... .EARLY IN THE MORNING...NW wind 5 to 10 kts. Mostly cloudy. Waves 2 ft or less. .TODAY...W wind 5 to 10 kts backing SW 10 to 20 kts in the afternoon. Light snow likely in the afternoon. Waves 2 ft or less. .TONIGHT...W wind 15 to 25 kts with gusts to around 30 kts. A chance of light snow in the evening. Waves 2 to 4 ft. .SATURDAY...W wind 15 to 25 kts with gusts to around 30 kts. Partly sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft early in the afternoon, then building to 2 to 4 ft late in the afternoon. .SATURDAY NIGHT...NW wind to around 30 kts. A chance of light snow. Waves 3 to 5 ft. $$ LMZ542-543-121400- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 202 AM CST Fri Dec 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH LATE SATURDAY NIGHT... .EARLY IN THE MORNING...NW wind 5 to 10 kts. Mostly cloudy. Waves 2 ft or less. .TODAY...W wind 5 to 10 kts increasing to 10 to 20 kts in the afternoon. Light snow likely in the afternoon. Waves 2 ft or less. .TONIGHT...W wind 15 to 25 kts with gusts to around 30 kts. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 ft building to 2 to 4 ft in the late evening and overnight. .SATURDAY...W wind 15 to 25 kts with gusts to around 30 kts. Partly cloudy. 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 to around 30 kts. Partly cloudy. Waves 2 to 4 ft. $$ See Lake Michigan Open Lake Forecast for Sunday through Tuesday.