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21NM E Green Bay WI

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 8:36 pm CDT Oct 18, 2026
Forecast Valid: 9pm CDT Oct 18, 2026-6pm CDT Oct 25, 2026

Tonight

SW wind 11 to 15 kt, with gusts as high as 22 kt. Clear. Waves 1 to 3 ft.

Monday

W wind 5 to 8 kt becoming variable and less than 5 kt. Sunny. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. Patchy fog after 2am. Waves 1 ft or less.

Tuesday

Variable winds 5 kt or less. Patchy fog before 8am. Waves 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Sunny. Waves 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

Thursday

Variable winds less than 5 kt becoming NE around 6 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Thursday Night

Variable winds less than 5 kt becoming E around 6 kt after midnight. Mostly clear. Waves 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.