For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Today
High: 72 °F
SSW 10kt
1ft
Tonight
Low: 57 °F
S 10kt
1ft
Thursday
High: 67 °F
WSW 10kt
< 1ft
Thursday Night
Low: 49 °F
Light Wind
< 1ft
Friday
High: 71 °F
SSE 10kt
< 1ft
Friday Night
Low: 53 °F
SSE 15kt
1ft
Saturday
High: 62 °F
W 15kt
1ft
Saturday Night
Low: 39 °F
W 15kt
1ft
Sunday
High: 51 °F
WNW 15kt
1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 5:21 am CDT Apr 15, 2026
Forecast Valid: 7am CDT Apr 15, 2026-6pm CDT Apr 21, 2026

View Nearby Observations

Detailed Forecast

Today

SSW wind around 10 kt, with gusts as high as 20 kt. Showers and possibly a thunderstorm, mainly before 4pm, then showers and thunderstorms likely after 4pm. Patchy fog before 9am. Waves around 1 ft.

Tonight

S wind around 10 kt, with gusts as high as 20 kt. Showers and thunderstorms likely before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Waves around 1 ft.

Thursday

SSW wind around 10 kt becoming WNW in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A slight chance of thunderstorms before 7pm. Waves 1 ft or less.

Friday

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

Friday Night

SSE wind 10 to 15 kt. Showers and possibly a thunderstorm. Waves around 1 ft.

Saturday

SSW wind around 15 kt becoming W in the afternoon. Winds could gust as high as 25 kt. A chance of showers and thunderstorms. Waves around 1 ft.

Saturday Night

W wind around 15 kt. Partly cloudy. Waves around 1 ft.

Sunday

WNW wind around 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves around 1 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.