FZUS53 KGRB 201824
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
124 PM CDT Mon Apr 20 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-202200-
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-
124 PM CDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT TUESDAY...

.THIS AFTERNOON...S wind 10 to 20 kts. Waves 1 to 3 ft. Mostly
sunny.
.TONIGHT...S wind 15 to 25 kts decreasing to 10 to 15 kts after
midnight. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight.
Mostly cloudy 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.

$$

LMZ541-202200-
Rock Island Passage to Sturgeon Bay WI-
124 PM CDT Mon Apr 20 2026

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

.THIS AFTERNOON...S wind 15 to 25 kts. Waves 4 to 7 ft. Partly
cloudy.
.TONIGHT...S wind to 30 kts decreasing to 10 to 20 kts after
midnight. Waves 5 to 8 ft. Mostly cloudy 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 2 to 4 ft in the
afternoon. Sunny.
.TUESDAY NIGHT...NE wind 5 to 10 kts. Waves 1 to 3 ft. Clear.

$$

LMZ542-543-202200-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
124 PM CDT Mon Apr 20 2026

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

.THIS AFTERNOON...S wind 15 to 25 kts. Waves 4 to 7 ft. Partly
cloudy.
.TONIGHT...S wind 15 to 25 kts decreasing to 10 to 15 kts after
midnight. Waves 4 to 7 ft. Mostly cloudy 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 subsiding to 2 to 4 ft in the
afternoon. Sunny.
.TUESDAY NIGHT...NE wind 10 to 15 kts. Waves 1 to 3 ft. Clear.

$$

See Lake Michigan Open Lake Forecast for Wednesday through Friday.

Wave height forecast is for ice free areas.