For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Today
High: 38 °F
NNW 20kt
2-4ft

Small Craft Advisory
Tonight
Low: 31 °F
NNW 20kt
2-4ft

Small Craft Advisory
Thursday
High: 46 °F
W 10kt
1-2ft
Thursday Night
Low: 40 °F
⇑S 30kt
4ft
Friday
High: 48 °F
W 30kt
3ft
Friday Night
Low: 31 °F
WNW 15kt
1ft
Saturday
High: 40 °F
E 10kt
1ft
Saturday Night
Low: 36 °F
⇑E 25kt
6ft
Sunday
High: 46 °F
E 30kt
9ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:11 am CDT Mar 11, 2026
Forecast Valid: 7am CDT Mar 11, 2026-6pm CDT Mar 17, 2026

View Nearby Observations

Detailed Forecast

Today

NNW wind 15 to 20 kt, with gusts as high as 30 kt. Rain before 1pm, then rain, possibly mixed with snow. Waves 2 to 4 ft.

Tonight

NNW wind 10 to 20 kt becoming W after midnight. A slight chance of rain and snow before 7pm. Waves 2 to 4 ft.

Thursday

W wind around 10 kt, with gusts as high as 15 kt. Sunny. Waves 1 to 2 ft.

Thursday Night

S wind 10 to 20 kt increasing to 20 to 30 kt after midnight. Winds could gust as high as 35 kt. Showers likely, mainly after 1am. Waves 1 ft building to 4 ft.

Friday

SW wind 20 to 30 kt becoming WNW in the afternoon. Winds could gust as high as 40 kt. Mostly sunny. Waves around 3 ft.

Friday Night

WNW wind 10 to 15 kt. Mostly cloudy. Waves around 1 ft.

Saturday

N wind 5 to 10 kt becoming ESE in the afternoon. A slight chance of snow before 1pm, then a chance of rain and snow. Waves around 1 ft.

Saturday Night

E wind 15 to 20 kt increasing to 20 to 25 kt after midnight. Rain and snow likely, mainly after 1am. Waves 2 ft building to 6 ft.

Sunday

E wind 25 to 30 kt becoming N in the afternoon. Rain. Waves 6 ft building to 9 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.