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4NM ENE Chicago IL

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 8:36 pm CDT Jul 20, 2026
Forecast Valid: 8pm CDT Jul 20, 2026-6pm CDT Jul 27, 2026

Tonight

SSW wind around 15 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms, mainly between midnight and 3am. Waves around 1 ft.

Tuesday

W wind 10 to 15 kt becoming NW in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Waves 1 to 2 ft.

Tuesday Night

N wind 15 to 20 kt. A chance of showers and thunderstorms before 8pm. Waves 2 ft building to 5 ft.

Wednesday

N wind around 15 kt. Sunny. Waves 3 to 5 ft.

Wednesday Night

NNE wind 5 to 10 kt becoming NW after midnight. Mostly clear. Waves 1 to 3 ft.

Thursday

Variable winds less than 5 kt becoming E 5 to 10 kt in the afternoon. Sunny. Waves 1 ft or less.

Thursday Night

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

Friday

Variable winds 5 kt or less. Winds could gust as high as 10 kt. Mostly sunny. Waves 1 ft or less.

Friday Night

Variable winds 5 kt or less. 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.