FZUS53 KGRB 180657
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
156 AM CDT Sat Apr 18 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ522-181000-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
156 AM CDT Sat Apr 18 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS
MORNING...

.REST OF THE NIGHT...W wind 10 to 20 kts veering NW after
midnight. Waves 1 to 3 ft. Patchy fog. showers likely.
.SATURDAY...W wind 15 to 25 kts. Waves 1 to 3 ft. A chance of
sprinkles in the morning. A slight chance of snow showers. A
slight chance of showers in the afternoon. A Small Craft Advisory
may be needed.
.SATURDAY NIGHT...W wind 10 to 20 kts. Waves 1 to 3 ft. Mostly
clear.
.SUNDAY...NW wind 10 to 15 kts. Waves 2 ft or less. A chance of
flurries in the morning. A chance of sprinkles.

$$

LMZ521-181000-
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-
156 AM CDT Sat Apr 18 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS
MORNING...

.REST OF THE NIGHT...SW wind 10 to 15 kts veering NW 10 to 20 kts
after midnight. Waves 1 to 3 ft. Patchy dense fog. showers
likely.
.SATURDAY...W wind 10 to 15 kts. Waves 1 to 3 ft. A slight chance
of rain and snow showers.
.SATURDAY NIGHT...W wind 10 to 15 kts. Waves 1 to 3 ft. Partly
cloudy.
.SUNDAY...NW wind 10 to 15 kts. Waves 2 ft or less. Partly
cloudy.

$$

LMZ541-181000-
Rock Island Passage to Sturgeon Bay WI-
156 AM CDT Sat Apr 18 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

.REST OF THE NIGHT...S wind 15 to 25 kts veering NW after
midnight. Waves 4 to 7 ft. Patchy dense fog. showers likely and a
slight chance of thunderstorms.
.SATURDAY...W wind 10 to 15 kts. Waves 3 to 5 ft subsiding to
1 to 3 ft in the afternoon. A slight chance of rain and snow
showers.
.SATURDAY NIGHT...W wind 10 to 15 kts. Waves 1 to 3 ft. Partly
cloudy.
.SUNDAY...NW wind 10 to 15 kts veering N early in the afternoon.
Waves 2 ft or less. Partly sunny.

$$

LMZ542-543-181000-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
156 AM CDT Sat Apr 18 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

.REST OF THE NIGHT...SW wind 10 to 20 kts veering W 15 to 25 kts
after midnight. Waves 4 to 7 ft. Patchy dense fog. showers
likely.
.SATURDAY...W wind 15 to 25 kts. Waves 2 to 4 ft subsiding to
1 to 3 ft in the afternoon. A slight chance of rain and snow
showers.
.SATURDAY NIGHT...W wind 15 to 25 kts decreasing to 10 to 15 kts
in the late evening and overnight. Waves 1 to 3 ft. Mostly clear.
A Small Craft Advisory may be needed.
.SUNDAY...NW wind 10 to 15 kts veering N early in the afternoon.
Waves 2 ft or less. A chance of flurries in the morning. A chance
of sprinkles.

$$

See Lake Michigan Open Lake Forecast for Monday through Wednesday.

Wave height forecast is for ice free areas.