FZUS53 KGRB 210853
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
353 AM CDT Thu May 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-
353 AM CDT Thu May 21 2026

.EARLY THIS MORNING...NE wind 5 to 10 kts. Waves 2 ft or less.
Clear.
.TODAY...NE wind 10 to 15 kts. Waves 2 ft or less. Partly sunny.
.TONIGHT...E wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy
in the evening then becoming mostly cloudy.
.FRIDAY...E wind 10 to 15 kts backing NE 15 to 25 kts early in
the afternoon. Waves 2 ft or less building to 2 to 4 ft in the
afternoon. Mostly cloudy in the morning then becoming mostly
sunny. A Small Craft Advisory may be needed.
.FRIDAY NIGHT...E wind 15 to 25 kts decreasing to 10 to 15 kts in
the late evening and overnight. Waves 2 to 4 ft subsiding to 1 to
3 ft after midnight. Rain showers likely after midnight.

$$

LMZ541-211600-
Rock Island Passage to Sturgeon Bay WI-
353 AM CDT Thu May 21 2026

.EARLY THIS MORNING...NE wind 10 to 15 kts. Waves 2 ft or less.
Clear.
.TODAY...NE wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy.
.TONIGHT...NE wind 10 to 15 kts veering E in the late evening and
overnight. Waves 1 to 3 ft. Mostly clear in the evening then
becoming mostly cloudy.
.FRIDAY...E wind 10 to 15 kts backing NE 15 to 25 kts early in
the afternoon. Waves 1 to 3 ft building to 3 to 5 ft in the
afternoon. Mostly cloudy in the morning then becoming mostly
sunny. A Small Craft Advisory may be needed.
.FRIDAY NIGHT...E wind 15 to 25 kts. Waves 3 to 5 ft subsiding to
2 to 4 ft after midnight. Rain showers likely after midnight.

$$

LMZ542-543-211600-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
353 AM CDT Thu May 21 2026

.EARLY THIS MORNING...NE wind 10 to 15 kts. Waves 1 to 3 ft.
Mostly clear.
.TODAY...NE wind 10 to 15 kts. Waves 1 to 3 ft. Partly cloudy in
the morning then becoming mostly cloudy.
.TONIGHT...NE wind 10 to 15 kts veering E in the late evening and
overnight. Waves 1 to 3 ft. Partly cloudy in the evening then
becoming mostly cloudy.
.FRIDAY...NE wind 10 to 20 kts. Waves 1 to 3 ft building to 2 to
4 ft in the afternoon. Partly sunny.
.FRIDAY NIGHT...NE wind 15 to 25 kts. Waves 3 to 5 ft. A chance
of showers in the evening, then showers likely after midnight. A
Small Craft Advisory may be needed.

$$

See Lake Michigan Open Lake Forecast for Saturday through Monday.

Wave height forecast is for ice free areas.