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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: 2:51 am CDT Jul 31, 2026
Forecast Valid: 7am CDT Jul 31, 2026-6pm CDT Aug 6, 2026

Today

S wind 5 to 10 kt becoming ESE in the afternoon. Winds could gust as high as 15 kt. A chance of showers, mainly after 4pm. Waves 1 ft or less.

Tonight

S wind 10 to 20 kt becoming E after midnight. Showers and possibly a thunderstorm. Waves 1 ft building to 4 ft.

Saturday

E wind 20 to 25 kt becoming NNE in the afternoon. Showers and possibly a thunderstorm. Waves 4 to 6 ft. occasionally to 8ft.

Saturday Night

NNE wind 20 to 25 kt. A chance of showers and thunderstorms before 1am. Waves 6 to 7 ft. occasionally to 9ft.

Sunday

N wind around 20 kt, with gusts as high as 25 kt. Partly sunny. Waves 5 to 6 ft. occasionally to 8ft.

Sunday Night

N wind 10 to 20 kt. Partly cloudy. Waves 6 ft subsiding to 3 ft.

Monday

NE wind around 10 kt. Sunny. Waves 1 to 3 ft.

Monday Night

NE wind 5 to 10 kt becoming ESE after midnight. Mostly clear. Waves around 1 ft.

Tuesday

Variable winds 5 kt or less. Mostly sunny. 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.