FZUS53 KGRB 150625
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
125 AM CDT Fri May 15 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-151000-
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-
125 AM CDT Fri May 15 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM CDT THIS MORNING
THROUGH THIS EVENING...

.REST OF THE NIGHT...S wind 10 to 15 kts. Waves 1 to 3 ft. A
chance of showers.
.FRIDAY...S wind 10 to 15 kts increasing to 15 to 25 kts in the
late morning and afternoon. Waves 2 to 4 ft. Partly cloudy.
.FRIDAY NIGHT...S wind 15 to 25 kts veering SW 10 to 15 kts in
the late evening and overnight. Waves 3 to 5 ft subsiding to 1 to
3 ft after midnight. Partly cloudy in the evening then becoming
mostly cloudy.
.SATURDAY...W wind 10 to 15 kts. Waves 2 ft or less. Mostly
sunny.

$$

LMZ541-151000-
Rock Island Passage to Sturgeon Bay WI-
125 AM CDT Fri May 15 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM CDT THIS MORNING
THROUGH SATURDAY MORNING...

.REST OF THE NIGHT...S wind 10 to 20 kts. Waves 2 to 4 ft. A
slight chance of showers.
.FRIDAY...S wind to 30 kts. Waves 4 to 7 ft building to 6 to
10 ft in the afternoon. A slight chance of showers in the
morning.
.FRIDAY NIGHT...S wind to 30 kts decreasing to 10 to 15 kts after
midnight. Waves 6 to 10 ft subsiding to 5 to 8 ft after midnight.
Partly cloudy in the evening then becoming mostly cloudy.
.SATURDAY...SW wind 10 to 15 kts. Waves 4 to 7 ft subsiding to
2 to 4 ft in the afternoon. Partly cloudy in the morning then
clearing.

$$

LMZ542-543-151000-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
125 AM CDT Fri May 15 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM CDT THIS MORNING
THROUGH SATURDAY MORNING...

.REST OF THE NIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft. A
slight chance of showers.
.FRIDAY...S wind to 30 kts. Waves 4 to 7 ft building to 6 to
10 ft in the afternoon. Partly cloudy.
.FRIDAY NIGHT...S wind 15 to 25 kts decreasing to 10 to 15 kts
after midnight. Waves 6 to 10 ft subsiding to 4 to 7 ft after
midnight. A chance of showers after midnight.
.SATURDAY...W wind 10 to 15 kts. Waves 3 to 5 ft subsiding to
2 to 4 ft in the afternoon. Partly cloudy in the morning then
clearing.

$$

See Lake Michigan Open Lake Forecast for Sunday through Tuesday.

Wave height forecast is for ice free areas.