FZUS53 KGRB 211133
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
633 AM CDT Tue Apr 21 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-211600-
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-
633 AM CDT Tue Apr 21 2026

.TODAY...SW wind 5 to 10 kts backing E early in the afternoon.
Waves 2 ft or less. Sunny.
.TONIGHT...NE wind 5 to 10 kts. Waves 2 ft or less. Clear.
.WEDNESDAY...E wind 5 to 10 kts veering SE early in the
afternoon. Waves 2 ft or less. Sunny.
.WEDNESDAY NIGHT...SE wind 5 to 10 kts. Waves 2 ft or less.
Mostly clear.

$$

LMZ541-211600-
Rock Island Passage to Sturgeon Bay WI-
633 AM CDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.TODAY...S wind 10 to 15 kts backing SE 5 to 10 kts early in the
afternoon. Waves 4 to 7 ft subsiding to 3 to 5 ft in the
afternoon. Sunny.
.TONIGHT...NE wind 5 to 10 kts. Waves 2 to 4 ft subsiding to 1 to
3 ft after midnight. Clear.
.WEDNESDAY...NE wind 5 to 10 kts veering E in the late morning
and afternoon. Waves 2 ft or less. Sunny.
.WEDNESDAY NIGHT...SE wind 10 to 15 kts. Waves 1 to 3 ft. Mostly
clear.

$$

LMZ542-543-211600-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
633 AM CDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.TODAY...S wind 5 to 10 kts backing SE early in the afternoon.
Waves 3 to 5 ft. Mostly sunny.
.TONIGHT...NE wind 10 to 15 kts. Waves 1 to 3 ft. Clear.
.WEDNESDAY...NE wind 5 to 10 kts veering E early in the
afternoon. Waves 2 ft or less. Sunny.
.WEDNESDAY NIGHT...SE wind 10 to 15 kts. Waves 1 to 3 ft. Mostly
clear.

$$

See Lake Michigan Open Lake Forecast for Thursday through Saturday.

Wave height forecast is for ice free areas.