FZUS53 KGRB 131621
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
1121 AM CDT Mon Apr 13 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-132200-
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-
1121 AM CDT Mon Apr 13 2026

.THIS AFTERNOON...E wind 5 to 10 kts. Waves 2 ft or less. A
chance of showers and a slight chance of thunderstorms in the
afternoon.
.TONIGHT...E wind 10 to 15 kts backing N 5 to 10 kts after
midnight. Waves 2 ft or less. Patchy fog in the evening. Areas of
dense fog after midnight. showers and a chance of thunderstorms.
.TUESDAY...N wind 5 to 10 kts veering NE in the late morning and
afternoon. Waves 2 ft or less. Patchy fog in the morning. a
chance of showers in the afternoon.
.TUESDAY NIGHT...NE wind 5 to 10 kts. Waves 2 ft or less. A
chance of showers.

$$

LMZ541-132200-
Rock Island Passage to Sturgeon Bay WI-
1121 AM CDT Mon Apr 13 2026

.THIS AFTERNOON...E wind 5 to 10 kts. Waves 2 to 4 ft. Patchy fog
during the morning.
.TONIGHT...E wind 10 to 15 kts. Waves 2 to 4 ft. Patchy fog in
the evening. Areas of dense fog after midnight. showers and a
chance of thunderstorms.
.TUESDAY...N wind 5 to 10 kts veering E early in the afternoon.
Waves 3 to 5 ft. Widespread fog in the morning. .
.TUESDAY NIGHT...NE wind 5 to 10 kts backing N after midnight.
Waves 1 to 3 ft. A chance of showers.

$$

LMZ542-543-132200-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
1121 AM CDT Mon Apr 13 2026

.THIS AFTERNOON...E wind 10 to 15 kts. Waves 1 to 3 ft. Patchy
fog during the morning. Areas of dense fog in the afternoon. a
chance of showers and thunderstorms in the afternoon.
.TONIGHT...E wind 10 to 15 kts veering SW after midnight. Waves
2 to 4 ft building to 3 to 5 ft after midnight. Patchy fog in the
evening. Areas of dense fog after midnight. thunderstorms likely
in the evening. Rain showers. A chance of thunderstorms after
midnight. A Small Craft Advisory may be needed.
.TUESDAY...NW wind 5 to 10 kts veering E in the late morning and
afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft in the
afternoon. Areas of dense fog in the morning. . A Small Craft
Advisory may be needed.
.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.