National Weather Service Marine Forecast FZUS53 KGRB

FZUS53 KGRB 131412
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
912 AM CDT Sun Sep 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
912 AM CDT Sun Sep 13 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING

THIS AFTERNOON
NW wind 10 to 20 kts. Waves 1 to 3 ft. Mostly cloudy early in the morning then clearing.

TONIGHT
N wind 10 to 15 kts decreasing to around 5 kts after midnight. Waves 2 ft or less. Clear.

MONDAY
NE wind around 5 kts veering S 10 to 15 kts mid-day, then increasing to 15 to 25 kts early in the afternoon. Waves 1 to 3 ft. A chance of showers in the afternoon. A Small Craft Advisory may be needed.

MONDAY NIGHT
S wind to 30 kts increasing to gales to 35 kts, then decreasing to to 30 kts after midnight. Waves 3 to 5 ft. Showers. A Gale Warning may be needed.

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LMZ543-132200
Two Rivers to Sheboygan WI
912 AM CDT Sun Sep 13 2026

THIS AFTERNOON
NW wind 10 to 15 kts increasing to 15 to 25 kts in the late morning and afternoon. Waves 1 to 3 ft. Mostly cloudy early in the morning then becoming partly cloudy.

TONIGHT
N wind 5 to 10 kts. Waves 2 ft or less. Clear.

MONDAY
E wind 5 to 10 kts veering SE 10 to 20 kts with gale force gusts to around 35 kts mid-day, then becoming S to 30 kts with gale force gusts to around 35 kts early in the afternoon. Waves 2 ft or less building to 4 to 7 ft in the afternoon. A chance of showers in the afternoon. A Small Craft Advisory may be needed.

MONDAY NIGHT
S gales to 40 kts decreasing to to 30 kts after midnight. Gusts to 45 kts. Waves 12 to 16 ft. A chance of showers in the evening. A chance of thunderstorms. Showers after midnight. A Gale Warning may be needed.

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LMZ541-542-132200
Rock Island Passage to Sturgeon Bay WI
Sturgeon Bay to Two Rivers WI
912 AM CDT Sun Sep 13 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING

THIS AFTERNOON
NW wind 10 to 20 kts. Waves 1 to 3 ft. Mostly cloudy early in the morning then clearing.

TONIGHT
N wind 10 to 15 kts. Waves 2 ft or less. Clear.

MONDAY
NE wind around 5 kts veering S 10 to 15 kts mid-day, then increasing to 15 to 25 kts early in the afternoon. Waves 2 ft or less building to 4 to 7 ft in the afternoon. A chance of showers in the afternoon. A Small Craft Advisory may be needed.

MONDAY NIGHT
S wind to 30 kts increasing to gales to 35 kts, then decreasing to to 30 kts after midnight. Gusts to 45 kts. Waves 8 to 12 ft building to 10 to 14 ft after midnight. Showers. A Gale Warning may be needed.

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See Lake Michigan Open Lake Forecast for Tuesday through Thursday.