National Weather Service Marine Forecast FZUS53 KGRB

FZUS53 KGRB 220238
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
938 PM CDT Fri Aug 21 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-221000
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
938 PM CDT Fri Aug 21 2026

REST OF TONIGHT
W wind 5 to 10 kts veering NW in the late evening and overnight. Waves 2 ft or less. A chance of showers and thunderstorms early in the evening.

SATURDAY
NW wind 10 to 15 kts. Waves 1 to 3 ft. A chance of showers. A chance of thunderstorms in the afternoon.

SATURDAY NIGHT
NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly clear.

SUNDAY
N wind 10 to 15 kts. Waves 1 to 3 ft. Mostly sunny.

LMZ541>543-221000
Rock Island Passage to Sturgeon Bay WI
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI
938 PM CDT Fri Aug 21 2026

REST OF TONIGHT
SW wind 5 to 10 kts veering NW 10 to 15 kts in the late evening and overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. A chance of showers and a slight chance of thunderstorms early in the evening.

SATURDAY
N wind 10 to 15 kts. Waves 1 to 3 ft. A chance of showers and thunderstorms in the afternoon.

SATURDAY NIGHT
N wind 10 to 20 kts. Waves 1 to 3 ft. Mostly clear.

SUNDAY
N wind 10 to 15 kts. Waves 1 to 3 ft. Mostly sunny.

See Lake Michigan Open Lake Forecast for Monday through Wednesday.