For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Tonight
Low: 17 °F
NW 25kt
4-6ft

Gale Warning
Tuesday
High: 26 °F
WNW 20kt
1-3ft

Small Craft Advisory
Tuesday Night
Low: 22 °F
S 15kt
1ft
Wednesday
High: 42 °F
S 15kt
1-2ft
Wednesday Night
Low: 35 °F
Light Wind
< 1ft
Thursday
High: 49 °F
Light Wind
< 1ft
Thursday Night
Low: 39 °F
Light Wind
< 1ft
Friday
High: 54 °F
SW 10kt
< 1ft
Friday Night
Low: 40 °F
NW 15kt
3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:01 pm CDT Mar 16, 2026
Forecast Valid: 9pm CDT Mar 16, 2026-6pm CDT Mar 23, 2026

View Nearby Observations

Detailed Forecast

Tonight

NW wind 20 to 25 kt, with gusts as high as 30 kt. Scattered snow showers, mainly before 1am. Widespread freezing spray before 1am. Waves 4 to 6 ft. occasionally to 8ft.

Tuesday

WNW wind 10 to 20 kt. Partly sunny. Waves 1 to 3 ft.

Tuesday Night

SW wind 10 to 15 kt becoming S after midnight. Snow, mainly after 10pm. Waves around 1 ft.

Wednesday

S wind 10 to 15 kt. A slight chance of snow before 10am. Waves 1 to 2 ft.

Wednesday Night

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

Thursday

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

Thursday Night

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

Friday

SW wind 5 to 10 kt. Partly sunny. Waves 1 ft or less.

Friday Night

WNW wind 10 to 15 kt becoming SSE after midnight. Mostly cloudy. Waves 1 ft or less building to 3 ft.

*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.