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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: 2:36 am CDT Oct 12, 2026
Forecast Valid: 2am CDT Oct 12, 2026-6pm CDT Oct 18, 2026

Columbus Day

S wind 5 to 7 kt. Mostly cloudy, then gradually becoming sunny. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 1am. Waves 1 ft or less.

Tuesday

NW wind 7 to 10 kt. Mostly sunny. Waves 1 ft or less.

Tuesday Night

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

Wednesday

N wind 6 to 8 kt. Partly sunny. Waves 1 ft or less.

Wednesday Night

NNE wind 6 to 8 kt. Mostly cloudy. Waves 1 ft or less.

Thursday

E wind 6 to 8 kt. A chance of showers. Waves 1 ft or less.

Thursday Night

ESE wind 5 to 10 kt becoming WNW 11 to 16 kt after midnight. Winds could gust as high as 22 kt. A chance of showers. Waves 1 ft or less.

Friday

NW wind 19 to 22 kt, with gusts as high as 30 kt. A slight chance of showers. 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.