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Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

This Afternoon
High: 71 °F
NNE 25kt
5-6ft

Small Craft Advisory
Tonight
Low: 70 °F
NE 25kt
7-8ft

Small Craft Advisory
Sunday
High: 70 °F
NNE 20kt
6ft

Small Craft Advisory
Sunday Night
Low: 68 °F
N 20kt
4-6ft

Small Craft Advisory
Monday
High: 72 °F
NE 10kt
2-3ft
Monday Night
Low: 67 °F
NNE 10kt
1ft
Tuesday
High: 78 °F
Light Wind
< 1ft
Tuesday Night
Low: 70 °F
Light Wind
< 1ft
Wednesday
High: 79 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:21 pm CDT Aug 1, 2026
Forecast Valid: 1pm CDT Aug 1, 2026-6pm CDT Aug 7, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

NNE wind 20 to 25 kt. Showers likely, with thunderstorms also possible after 2pm. Waves 5 to 6 ft. occasionally to 8ft.

Tonight

NE wind 20 to 25 kt. A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 3am. Waves 7 to 8 ft. occasionally to 10ft.

Sunday

NNE wind around 20 kt. Mostly cloudy, then gradually becoming sunny. Waves around 6 ft.

Sunday Night

N wind 10 to 20 kt. Partly cloudy. Waves 4 to 6 ft. occasionally to 8ft.

Monday

NE wind around 10 kt. Mostly sunny. Waves 2 to 3 ft.

Monday Night

NNE wind 5 to 10 kt becoming SSE after midnight. Mostly clear. Waves around 1 ft.

Tuesday

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

Tuesday Night

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

Wednesday

Variable winds 5 kt or less. A 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.