FZUS53 KGRB 121045
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
545 AM CDT Sun Apr 12 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-121600-
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-
545 AM CDT Sun Apr 12 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH LATE TONIGHT...

.EARLY THIS MORNING...SE wind 10 to 15 kts. Waves 1 to 3 ft.
Patchy fog. showers and a chance of thunderstorms.
.TODAY...S wind 15 to 25 kts. Waves 1 to 3 ft building to 2 to
4 ft in the afternoon. Patchy fog. showers likely in the morning.
A chance of thunderstorms. A chance of showers in the afternoon.
.TONIGHT...SW wind to 30 kts decreasing to 10 to 20 kts after
midnight. Waves 3 to 5 ft. Patchy fog. .
.MONDAY...W wind 5 to 10 kts veering NE mid-day, then veering E
early in the afternoon. Waves 1 to 3 ft. Patchy fog in the
morning. .
.MONDAY NIGHT...SE wind 10 to 15 kts backing N after midnight.
Waves 2 ft or less. Rain showers and a chance of thunderstorms.

$$

LMZ541-121600-
Rock Island Passage to Sturgeon Bay WI-
545 AM CDT Sun Apr 12 2026

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

.EARLY THIS MORNING...SE wind 15 to 25 kts. Waves 4 to 7 ft.
Patchy fog. showers and a slight chance of thunderstorms.
.TODAY...S wind 15 to 25 kts. Waves 5 to 8 ft building to 6 to
10 ft in the afternoon. Patchy fog in the morning. Areas of dense
fog in the afternoon. showers likely in the morning. A chance of
thunderstorms. A chance of showers in the afternoon.
.TONIGHT...SW wind to 30 kts decreasing to 10 to 20 kts after
midnight. Waves 6 to 10 ft. Areas of fog in the evening, then
patchy fog after midnight. .
.MONDAY...W wind 10 to 15 kts veering NE 5 to 10 kts mid-day,
then veering E early in the afternoon. Waves 4 to 7 ft subsiding
to 2 to 4 ft in the afternoon. Patchy fog in the morning.
.MONDAY NIGHT...SE wind 10 to 15 kts backing NW after midnight.
Waves 1 to 3 ft building to 2 to 4 ft after midnight. Rain
showers and a chance of thunderstorms.

$$

LMZ542-543-121600-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
545 AM CDT Sun Apr 12 2026

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

.EARLY THIS MORNING...S wind 15 to 25 kts. Waves 4 to 7 ft. A
chance of showers and thunderstorms.
.TODAY...S wind 15 to 25 kts. Waves 5 to 8 ft. Patchy fog. a
chance of showers and thunderstorms.
.TONIGHT...SW wind to 30 kts. Waves 6 to 10 ft subsiding to 4 to
7 ft after midnight. Patchy fog. .
.MONDAY...W wind 10 to 15 kts backing SE early in the afternoon.
Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon. Patchy
fog in the morning. a chance of showers in the afternoon.
.MONDAY NIGHT...SE wind 10 to 15 kts veering SW after midnight.
Waves 2 to 4 ft. Rain showers and a chance of thunderstorms.

$$

See Lake Michigan Open Lake Forecast for Tuesday through Thursday.

Wave height forecast is for ice free areas.