FZUS53 KGRB 022120
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
420 PM CDT Thu Apr 2 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-030400-
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-
420 PM CDT Thu Apr 2 2026

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

.LATE THIS AFTERNOON...NE wind 10 to 20 kts. Waves 3 to 5 ft.
Rain and a slight chance of thunderstorms.
.TONIGHT...NE wind 10 to 20 kts backing W 10 to 15 kts after
midnight. Waves 2 to 4 ft subsiding to 2 ft or less after
midnight. Light rain likely and a slight chance of thunderstorms
in the evening, then a slight chance of light rain after
midnight.
.FRIDAY...W wind 5 to 10 kts veering NE early in the afternoon.
Waves 2 ft or less. Partly cloudy.
.FRIDAY NIGHT...NE wind 10 to 15 kts veering E 15 to 25 kts in
the late evening and overnight. Waves 2 to 4 ft. Rain and
freezing rain. A Small Craft Advisory may be needed.
.SATURDAY...E wind 10 to 20 kts backing N 10 to 15 kts mid-day,
then backing W early in the afternoon. Waves 1 to 3 ft. Light
rain in the morning, then a chance of light rain in the
afternoon.

$$

LMZ541-030400-
Rock Island Passage to Sturgeon Bay WI-
420 PM CDT Thu Apr 2 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING...

.LATE THIS AFTERNOON...E wind 15 to 25 kts. Waves 6 to 10 ft.
Rain and a slight chance of thunderstorms.
.TONIGHT...NE wind 10 to 20 kts backing NW 10 to 15 kts, then
backing W after midnight. Waves 5 to 8 ft. Rain and a chance of
thunderstorms in the evening.
.FRIDAY...NW wind 10 to 15 kts veering N 5 to 10 kts early in the
afternoon. Waves 4 to 7 ft subsiding to 1 to 3 ft in the
afternoon. Partly cloudy.
.FRIDAY NIGHT...E wind 15 to 25 kts. Waves 3 to 5 ft building to
4 to 7 ft after midnight. A chance of light rain in the evening,
then rain after midnight. A Small Craft Advisory may be needed.
.SATURDAY...E wind 15 to 25 kts veering SE 10 to 15 kts mid-day,
then veering SW early in the afternoon. Waves 4 to 7 ft subsiding
to 3 to 5 ft in the afternoon. Light rain in the morning, then a
chance of light rain in the afternoon.

$$

LMZ542-543-030400-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
420 PM CDT Thu Apr 2 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING...

.LATE THIS AFTERNOON...E wind 10 to 15 kts. Waves 6 to 10 ft.
Rain and a chance of thunderstorms.
.TONIGHT...SE wind 10 to 15 kts veering W in the late evening and
overnight. Waves 6 to 10 ft subsiding to 5 to 8 ft after
midnight. Rain and a chance of thunderstorms in the evening.
.FRIDAY...W wind 10 to 15 kts veering NE early in the afternoon.
Waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. Partly
cloudy.
.FRIDAY NIGHT...E wind 15 to 25 kts. Waves 4 to 7 ft. Rain.
.SATURDAY...SE wind 15 to 25 kts veering SW in the late morning
and afternoon. Waves 4 to 7 ft. Light rain likely in the morning,
then a chance of light rain in the afternoon.

$$

See Lake Michigan Open Lake Forecast for Sunday through Tuesday.

Wave height forecast is for ice free areas.