Nearshore Marine Forecast
Issued by NWS Green Bay, WI

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FZUS53 KGRB 201142
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
642 AM CDT Sun Apr 20 2025

For waters within five nautical miles of the shore on Lake Michigan

LMZ521-522-202000-
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-
642 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY EVENING...

.TODAY...E wind 10 to 15 kts. A slight chance of rain showers in
the afternoon. Waves 2 ft or less.
.TONIGHT...E wind 15 to 25 kts. Gusts to around 30 kts after
midnight. Rain showers. Waves 1 to 3 ft building to 3 to 5 ft.
.MONDAY...E wind 10 to 20 kts backing W in the afternoon. Gusts
to around 25 kts. Light rain showers likely in the morning, then
a chance of rain showers in the afternoon. Waves 3 to 5 ft
subsiding to 1 to 3 ft in the afternoon.
.MONDAY NIGHT...W wind 10 to 20 kts with gusts to around 25 kts.
Mostly cloudy in the evening then becoming partly cloudy. Waves
1 to 3 ft.

$$

LMZ541-202000-
Rock Island Passage to Sturgeon Bay WI-
642 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY EVENING...

.TODAY...E wind 5 to 10 kts backing NE 10 to 20 kts in the
afternoon. A slight chance of rain showers in the afternoon.
Waves 2 ft or less.
.TONIGHT...E wind 15 to 25 kts. Gusts to around 30 kts after
midnight. Rain showers. Waves 1 to 3 ft building to 4 to 7 ft.
.MONDAY...SE wind 10 to 20 kts veering SW in the afternoon. Gusts
to around 25 kts. Light rain showers in the morning, then a
chance of rain showers in the afternoon. Waves 4 to 7 ft.
.MONDAY NIGHT...W wind 10 to 20 kts with gusts to around 25 kts.
Mostly cloudy in the evening then becoming partly cloudy. Waves
3 to 5 ft subsiding to 1 to 3 ft.

$$

LMZ542-543-202000-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
642 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
MONDAY EVENING...

.TODAY...NE wind 10 to 20 kts. A chance of rain showers in the
afternoon. Waves 1 to 3 ft.
.TONIGHT...E wind 15 to 25 kts. Rain showers and a slight chance
of thunderstorms. Waves 2 to 4 ft building to 5 to 8 ft.
.MONDAY...S wind 10 to 20 kts veering W in the afternoon. Gusts
to around 30 kts. Light rain showers likely in the morning, then
a chance of rain showers in the afternoon. Waves 5 to 8 ft
subsiding to 4 to 7 ft.
.MONDAY NIGHT...W wind 10 to 20 kts. Gusts to around 25 kts in
the evening. Mostly clear. Waves 2 to 4 ft subsiding to 1 to 3 ft
in the late evening and overnight.

$$

See Lake Michigan Open Lake Forecast for Tuesday through Thursday.