For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Today
High: 74 °F
SW 15kt
1ft

Small Craft Advisory
Tonight
Low: 50 °F
SW 10kt
< 1ft
Wednesday
High: 52 °F
Light Wind
< 1ft
Wednesday Night
Low: 52 °F
Light Wind
< 1ft
Thursday
High: 76 °F
S 10kt
< 1ft
Thursday Night
Low: 59 °F
S 10kt
1ft
Friday
High: 73 °F
S 10kt
< 1ft
Friday Night
Low: 48 °F
W 10kt
< 1ft
Saturday
High: 58 °F
N 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 11:05 am CDT Apr 21, 2026
Forecast Valid: 11am CDT Apr 21, 2026-6pm CDT Apr 27, 2026

View Nearby Observations

Detailed Forecast

Today

SW wind around 15 kt, with gusts as high as 25 kt. Scattered showers and thunderstorms after 3pm. Waves around 1 ft.

Tonight

SW wind 5 to 10 kt becoming NNW after midnight. Isolated showers and thunderstorms before 8pm. Patchy fog after 10pm. Waves 1 ft or less.

Wednesday

Variable winds 5 kt or less. Areas of fog. Waves 1 ft or less.

Wednesday Night

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

Thursday

S wind 5 to 10 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 ft or less.

Thursday Night

S wind around 10 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Waves around 1 ft.

Friday

S wind around 10 kt becoming SW in the afternoon. Winds could gust as high as 15 kt. Showers likely, with thunderstorms also possible after 1pm. Waves 1 ft or less.

Friday Night

W wind around 10 kt becoming NNW after midnight. Mostly cloudy. Waves 1 ft or less.

Saturday

N wind around 10 kt. Mostly sunny. Waves 1 to 2 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.