FZUS53 KGRB 210516
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
1216 AM CDT Tue Apr 21 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-211000-
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-
1216 AM CDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT EARLY THIS
MORNING...

.REST OF THE NIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft
subsiding to 1 to 3 ft after midnight. Mostly cloudy late in the
evening then becoming partly cloudy.
.TUESDAY...SW wind 5 to 10 kts backing E early in the afternoon.
Waves 2 ft or less. Sunny.
.TUESDAY NIGHT...NE wind 5 to 10 kts. Waves 2 ft or less. Clear.
.WEDNESDAY...NE wind 5 to 10 kts veering SE in the late morning
and afternoon. Waves 2 ft or less. Sunny.

$$

LMZ541-211000-
Rock Island Passage to Sturgeon Bay WI-
1216 AM CDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.REST OF THE NIGHT...S wind 15 to 25 kts. Waves 4 to 7 ft. Mostly
cloudy late in the evening then becoming partly cloudy.
.TUESDAY...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.
.TUESDAY NIGHT...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.

$$

LMZ542-543-211000-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
1216 AM CDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.REST OF THE NIGHT...S wind 15 to 25 kts decreasing to 10 to
15 kts after midnight. Waves 4 to 7 ft. Mostly cloudy late in the
evening then becoming partly cloudy.
.TUESDAY...S wind 10 to 15 kts backing SE 5 to 10 kts early in
the afternoon. Waves 3 to 5 ft. Sunny.
.TUESDAY NIGHT...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.

$$

See Lake Michigan Open Lake Forecast for Thursday through Saturday.

Wave height forecast is for ice free areas.