Nearshore Marine Forecast
Issued by NWS Green Bay, WI

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FZUS53 KGRB 201942
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
241 PM CDT Tue May 20 2025

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

LMZ521-522-210200-
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-
242 PM CDT Tue May 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...

.THIS AFTERNOON...NE wind 15 to 25 kts with gusts to around
30 kts. A chance of rain showers. Waves 4 to 7 ft.
.TONIGHT...E wind 10 to 20 kts with gusts to around 25 kts. A
chance of rain showers. Waves 3 to 5 ft subsiding to 1 to 3 ft
after midnight, then building to 2 to 4 ft early in the morning.
.WEDNESDAY...NE wind 15 to 25 kts. A chance of rain showers.
Waves 2 to 4 ft subsiding to 1 to 3 ft late in the afternoon.
.WEDNESDAY NIGHT...N wind 10 to 20 kts. Mostly cloudy. Waves 1 to
3 ft.

$$

LMZ541-210200-
Rock Island Passage to Sturgeon Bay WI-
242 PM CDT Tue May 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT...

.THIS AFTERNOON...NE wind 15 to 25 kts with gusts to around
30 kts. A slight chance of rain showers. Waves 4 to 7 ft.
.TONIGHT...NE wind 15 to 25 kts. A chance of rain showers. Waves
4 to 7 ft subsiding to 3 to 5 ft in the late evening and
overnight.
.WEDNESDAY...NE wind 15 to 25 kts. A chance of rain showers.
Waves 3 to 5 ft.
.WEDNESDAY NIGHT...N wind 10 to 20 kts with gusts to around
25 kts. Mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft in
the late evening and overnight.

$$

LMZ542-543-210200-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
242 PM CDT Tue May 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT...

.THIS AFTERNOON...NE wind 10 to 20 kts with gusts to around
25 kts. Rain showers likely. Waves 4 to 7 ft.
.TONIGHT...NE wind 15 to 25 kts. Rain showers likely. Waves 4 to
7 ft.
.WEDNESDAY...NE wind 15 to 25 kts. Rain showers likely. Waves
4 to 7 ft.
.WEDNESDAY NIGHT...N wind 10 to 20 kts with gusts to around
25 kts. A chance of rain showers in the evening. Waves 3 to 5 ft
subsiding to 1 to 3 ft after midnight.

$$

See Lake Michigan Open Lake Forecast for Friday through Sunday.