FZUS53 KGRB 131018
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
518 AM CDT Mon Apr 13 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-131600-
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-
518 AM CDT Mon Apr 13 2026

.EARLY THIS MORNING...W wind 10 to 15 kts. Waves 1 to 3 ft. Areas
of dense fog. 
.TODAY...W wind 5 to 10 kts veering NE mid-day, then veering E
10 to 15 kts early in the afternoon. Waves 1 to 3 ft. Patchy fog
in the morning. a slight chance of thunderstorms in the
afternoon. 
.TONIGHT...E wind 10 to 15 kts backing NE 5 to 10 kts after
midnight. Waves 2 ft or less. Patchy fog in the evening, then
areas of fog after midnight. rain with thunderstorms likely in
the evening, then showers and a chance of thunderstorms after
midnight. 
.TUESDAY...N wind 5 to 10 kts veering E in the late morning and
afternoon. Waves 2 ft or less. Areas of fog in the morning. . 
.TUESDAY NIGHT...NE wind 5 to 10 kts. Waves 2 ft or less. A
chance of showers.  

$$

LMZ541-131600-
Rock Island Passage to Sturgeon Bay WI-
518 AM CDT Mon Apr 13 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT THIS MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

.EARLY THIS MORNING...W wind 10 to 15 kts. Waves 4 to 7 ft. Areas
of dense fog. 
.TODAY...NW 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. 
.TONIGHT...E wind 10 to 15 kts. Waves 1 to 3 ft building to 2 to
4 ft after midnight. Patchy fog in the evening, then areas of fog
after midnight. rain with thunderstorms likely in the evening,
then showers and a chance of thunderstorms after midnight. 
.TUESDAY...NW wind 5 to 10 kts veering SE early in the afternoon.
Waves 2 to 4 ft. Areas of fog in the morning. Patchy fog in the
afternoon. . 
.TUESDAY NIGHT...NE wind 5 to 10 kts backing N after midnight.
Waves 1 to 3 ft. A chance of showers.  

$$

LMZ542-543-131600-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
518 AM CDT Mon Apr 13 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

.EARLY THIS MORNING...SW wind 10 to 20 kts. Waves 3 to 5 ft.
Patchy fog. 
.TODAY...W wind 10 to 15 kts backing E in the late morning and
afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft in the
afternoon. Patchy dense fog. a slight chance of light rain and
thunderstorms in the afternoon. 
.TONIGHT...E wind 10 to 15 kts veering SW 5 to 10 kts after
midnight. Waves 1 to 3 ft building to 2 to 4 ft after midnight.
Patchy fog. rain with thunderstorms likely in the evening. A
chance of thunderstorms after midnight. 
.TUESDAY...W wind 5 to 10 kts backing SE early in the afternoon.
Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon. Areas of
fog in the morning. a chance of showers in the afternoon. 
.TUESDAY NIGHT...N wind 5 to 10 kts. Waves 1 to 3 ft. Rain
showers likely and a chance of thunderstorms in the evening, then
a chance of showers after midnight.  

$$

See Lake Michigan Open Lake Forecast for Wednesday through Friday.

Wave height forecast is for ice free areas.