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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: 2:56 pm CDT Aug 18, 2026
Forecast Valid: 5pm CDT Aug 18, 2026-6pm CDT Aug 25, 2026

Late Afternoon

SW wind around 10 kt, with gusts as high as 15 kt. A slight chance of showers and thunderstorms. Waves around 1 ft.

Tonight

SW wind 5 to 10 kt becoming W after midnight. Showers and thunderstorms likely, mainly before 3am. Waves 1 ft or less.

Wednesday

WNW wind 5 to 10 kt becoming NE in the afternoon. Partly sunny. Waves 1 ft or less.

Wednesday Night

ENE wind 5 to 10 kt. Mostly cloudy, then gradually becoming mostly clear. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Thursday Night

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

Friday

SSW wind 5 to 10 kt. A chance of showers and thunderstorms after 1pm. Waves 1 ft or less.

Friday Night

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

Saturday

W wind around 10 kt becoming N in the afternoon. 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.