Last Update: 347 PM CDT Sun Apr 5 2026

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Green Bay, WI Local Forecast Office

21NM SSE Washington Island WI

Marine Zone Forecast

Tonight
West winds 10 to 20 kt becoming northwest. Chance of rain showers this evening. Waves 2 to 4 ft subsiding to 1 to 3 ft.
Monday
Northwest winds 10 to 20 kt becoming north to 30 kt. Slight chance of snow showers in the morning, then chance of snow showers in the afternoon. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
Monday Night
North winds to 30 kt diminishing to 10 to 20 kt. Freezing spray in the evening. Chance of snow showers in the evening. Waves 6 to 9 ft occasionally to 12 ft.
Tuesday
Northwest winds 10 to 15 kt backing to southwest 10 to 20 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
Tuesday Night
South winds 10 to 20 kt increasing to 15 to 25 kt. Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.
Wednesday
South winds to 30 kt increasing to gales to 35 kt. Chance of rain showers in the morning. Waves 8 to 11 ft occasionally to 14 ft building to 10 to 14 ft occasionally to 18 ft.
Wednesday Night
South gales to 40 kt. Rain showers. Waves 12 to 16 ft occasionally to 21 ft.
Thursday
Southwest winds to 30 kt diminishing to 15 to 25 kt. Chance of rain showers. Waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to 8 ft occasionally to 10 ft.
Friday
Northwest winds 10 to 15 kt becoming north. Waves 2 to 4 ft.



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347 PM CDT Sun Apr 5 2026
 
 

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