Nearshore Marine Forecast
Issued by NWS Green Bay, WI

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FZUS53 KGRB 180203
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Nearshore Marine Forecast
National Weather Service Green Bay WI
903 PM CDT Fri Oct 17 2025

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

LMZ521-522-181000-
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-
903 PM CDT Fri Oct 17 2025

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

.REST OF THE NIGHT...SW wind 10 to 20 kts with gusts to around
25 kts. Scattered rain showers and a slight chance of
thunderstorms. Waves 2 to 4 ft subsiding to 1 to 3 ft after
midnight.
.SATURDAY...SW wind 5 to 10 kts. Partly cloudy in the morning
then clearing. Waves 2 ft or less.
.SATURDAY NIGHT...SW wind 5 to 10 kts veering N 10 to 20 kts
after midnight. Light rain showers likely after midnight. Waves
1 to 3 ft.
.SUNDAY...NW wind 10 to 20 kts with gusts to around 25 kts. A
chance of rain showers. Waves 2 to 4 ft subsiding to 1 to 3 ft
late in the afternoon. A Small Craft Advisory may be needed.

$$

LMZ541-181000-
Rock Island Passage to Sturgeon Bay WI-
903 PM CDT Fri Oct 17 2025

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

.REST OF THE NIGHT...S wind 15 to 25 kts with gusts to around
30 kts. Scattered rain showers and a slight chance of
thunderstorms. Waves 6 to 10 ft subsiding to 4 to 7 ft.
.SATURDAY...SW wind 5 to 10 kts. Isolated rain showers in the
morning. Waves 4 to 7 ft subsiding to 2 to 4 ft in the afternoon.
.SATURDAY NIGHT...SW wind 5 to 10 kts veering N 10 to 20 kts
after midnight. Light rain showers likely after midnight. Waves
1 to 3 ft.
.SUNDAY...NW wind 15 to 25 kts. Light rain showers likely in the
morning. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon.
A Small Craft Advisory may be needed.

$$

LMZ542-543-181000-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
903 PM CDT Fri Oct 17 2025

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

.REST OF THE NIGHT...S wind 10 to 20 kts with gusts to around
25 kts. Isolated rain showers early in the evening. A slight
chance of thunderstorms. Scattered rain showers after midnight.
Waves 5 to 8 ft subsiding to 4 to 7 ft.
.SATURDAY...SW wind 5 to 10 kts. Isolated rain showers in the
morning. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SATURDAY NIGHT...SW wind 5 to 10 kts veering NW 10 to 20 kts
with gusts to around 25 kts after midnight. Rain showers likely
after midnight. Waves 1 to 3 ft.
.SUNDAY...NW wind 15 to 25 kts with gusts to around 30 kts. A
chance of rain showers. Waves 2 to 4 ft.

$$

See Lake Michigan Open Lake Forecast for Monday through Wednesday.