National Weather Service Marine Forecast FZUS53 KGRB

FZUS53 KGRB 130333
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
1033 PM CDT Sat Sep 12 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-131000
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
1033 PM CDT Sat Sep 12 2026

REST OF TONIGHT
NW wind 10 to 15 kts. Waves 2 ft or less. Mostly clear.

SUNDAY
NW wind 10 to 20 kts. Waves 1 to 3 ft. Mostly cloudy in the morning then clearing.

SUNDAY NIGHT
N wind 10 to 15 kts decreasing to around 5 kts after midnight. Waves 1 to 3 ft. Clear.

MONDAY
NE wind around 5 kts veering S 10 to 15 kts in the late morning and afternoon. Waves 1 to 3 ft. Sunny in the morning then becoming partly sunny.

LMZ541>543-131000
Rock Island Passage to Sturgeon Bay WI
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI
1033 PM CDT Sat Sep 12 2026

REST OF TONIGHT
NW wind 10 to 15 kts. Waves 1 to 3 ft. Partly cloudy.

SUNDAY
NW wind 10 to 15 kts increasing to 15 to 25 kts in the late morning and afternoon. Waves 1 to 3 ft. Mostly cloudy in the morning then clearing. A Small Craft Advisory may be needed.

SUNDAY NIGHT
N wind 10 to 15 kts. Waves 2 ft or less. Clear.

MONDAY
NE wind around 5 kts becoming S 10 to 20 kts in the late morning and afternoon. Waves 2 ft or less building to 3 to 5 ft in the afternoon. Sunny in the morning then becoming partly sunny. A Small Craft Advisory may be needed.

See Lake Michigan Open Lake Forecast for Tuesday through Thursday.