FZUS53 KGRB 182013
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
313 PM CDT Mon May 18 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-190400-
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-
313 PM CDT Mon May 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...

.LATE THIS AFTERNOON...SE wind 10 to 15 kts. Waves 2 ft or less.
A slight chance of showers and thunderstorms. 
.TONIGHT...SE wind 10 to 15 kts veering S after midnight. Waves
2 ft or less. Patchy fog. a chance of showers and thunderstorms. 
.TUESDAY...SW wind 15 to 25 kts veering NW 10 to 15 kts early in
the afternoon. Waves 1 to 3 ft. A chance of showers in the
morning. 
.TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly
cloudy in the evening then becoming partly cloudy. 
.WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in
the afternoon. Waves 2 ft or less. Mostly sunny.  

$$

LMZ541-190400-
Rock Island Passage to Sturgeon Bay WI-
313 PM CDT Mon May 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH
LATE TUESDAY NIGHT...

.LATE THIS AFTERNOON...SE wind 5 to 10 kts. Waves 3 to 5 ft.
Patchy fog. 
.TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to
7 ft after midnight. Patchy dense fog in the evening. Areas of
dense fog after midnight. a chance of showers in the evening. A
chance of thunderstorms. Rain showers after midnight. 
.TUESDAY...SW wind 15 to 25 kts veering NW 10 to 20 kts early in
the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a
chance of showers. 
.TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding
to 1 to 3 ft after midnight. Mostly cloudy in the evening then
becoming partly cloudy. 
.WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in
the afternoon. Waves 2 ft or less. Mostly sunny.  

$$

LMZ542-543-190400-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
313 PM CDT Mon May 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH
LATE TUESDAY NIGHT...

.LATE THIS AFTERNOON...SE wind 5 to 10 kts. Waves 2 to 4 ft.
Patchy fog. a slight chance of showers and thunderstorms. 
.TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to
7 ft after midnight. Patchy fog. a chance of showers and
thunderstorms. 
.TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon.
Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers
in the morning. 
.TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft. Mostly
cloudy in the evening then becoming partly cloudy. 
.WEDNESDAY...N wind 10 to 15 kts veering NE in the late morning
and afternoon. Waves 2 ft or less. Mostly sunny.  

$$

See Lake Michigan Open Lake Forecast for Thursday through Saturday.

Wave height forecast is for ice free areas.