Nearshore Marine Forecast
Issued by NWS Green Bay, WI

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740
FZUS53 KGRB 230047
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
747 PM CDT Fri Aug 22 2025

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

LMZ521-522-230800-
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-
747 PM CDT Fri Aug 22 2025

.TONIGHT...SW wind 5 to 10 kts veering W 10 to 20 kts after
midnight. A slight chance of thunderstorms in the evening. A
chance of light showers. Waves 2 ft or less.
.SATURDAY...NW wind 10 to 20 kts. Mostly sunny in the morning
then becoming partly cloudy. Waves 2 ft or less.
.SATURDAY NIGHT...W wind 10 to 20 kts. Mostly clear. Waves 2 ft
or less.
.SUNDAY...NW wind 10 to 20 kts. A chance of sprinkles in the
morning, then a chance of rain showers in the afternoon. Waves
2 ft or less.

$$

LMZ541-230800-
Rock Island Passage to Sturgeon Bay WI-
747 PM CDT Fri Aug 22 2025

.TONIGHT...SW wind 10 to 20 kts. A chance of light showers and a
slight chance of thunderstorms. Waves 1 to 3 ft.
.SATURDAY...NW wind 10 to 20 kts. Mostly sunny in the morning
then becoming partly cloudy. Waves 1 to 3 ft.
.SATURDAY NIGHT...NW wind 10 to 20 kts. A chance of sprinkles
after midnight. Waves 2 ft or less.
.SUNDAY...NW wind 10 to 20 kts. A chance of sprinkles in the
morning, then a chance of rain showers in the afternoon. Waves
2 ft or less.

$$

LMZ542-543-230800-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
747 PM CDT Fri Aug 22 2025

.TONIGHT...SW wind 10 to 15 kts veering W 10 to 20 kts after
midnight. A chance of light showers and a slight chance of
thunderstorms. Waves 1 to 3 ft.
.SATURDAY...W wind 10 to 20 kts. Mostly sunny in the morning then
becoming partly cloudy. Waves 2 ft or less.
.SATURDAY NIGHT...NW wind 10 to 20 kts. Mostly clear. Waves 2 ft
or less.
.SUNDAY...NW wind 10 to 20 kts. A chance of rain showers in the
afternoon. Waves 2 ft or less.

$$

See Lake Michigan Open Lake Forecast for Monday through Wednesday.