FZUS53 KGRB 231721
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
1221 PM CDT Thu Apr 23 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-232200-
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-
1221 PM CDT Thu Apr 23 2026

.THIS AFTERNOON...S wind 10 to 15 kts. Waves 1 to 3 ft. Mostly
sunny.
.TONIGHT...SE wind 10 to 15 kts. Waves 1 to 3 ft. A chance of
showers and thunderstorms.
.FRIDAY...SE wind 10 to 15 kts backing N early in the afternoon.
Waves 2 ft or less. Rain showers in the morning. A chance of
showers in the afternoon.
.FRIDAY NIGHT...N wind 10 to 15 kts. Waves 2 ft or less. A chance
of showers.

$$

LMZ541-232200-
Rock Island Passage to Sturgeon Bay WI-
1221 PM CDT Thu Apr 23 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM CDT THIS EVENING
THROUGH FRIDAY EVENING...

.THIS AFTERNOON...S wind 10 to 15 kts. Waves 1 to 3 ft building
to 2 to 4 ft in the afternoon. Patchy fog in the afternoon.
.TONIGHT...SE wind 10 to 15 kts. Waves 4 to 7 ft. Patchy fog in
the evening. a chance of showers and a slight chance of
thunderstorms after midnight.
.FRIDAY...SE wind 10 to 15 kts backing N early in the afternoon.
Waves 4 to 7 ft. Rain showers and a chance of thunderstorms.
.FRIDAY NIGHT...N wind 10 to 15 kts. Waves 2 to 4 ft. A chance of
showers.

$$

LMZ542-543-232200-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
1221 PM CDT Thu Apr 23 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH FRIDAY EVENING...

.THIS AFTERNOON...S wind 10 to 20 kts. Waves 1 to 3 ft building
to 3 to 5 ft in the afternoon. Patchy fog in the afternoon.
.TONIGHT...S wind 10 to 20 kts. Waves 4 to 7 ft. Patchy fog in
the evening. a slight chance of showers in the evening. A chance
of thunderstorms. Rain showers likely after midnight.
.FRIDAY...S wind 10 to 20 kts veering NW 10 to 15 kts early in
the afternoon. Waves 4 to 7 ft. Rain showers.
.FRIDAY NIGHT...N wind 10 to 15 kts. Waves 2 to 4 ft subsiding to
1 to 3 ft after midnight. Partly cloudy.

$$

See Lake Michigan Open Lake Forecast for Saturday through Monday.

Wave height forecast is for ice free areas.