For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

This Afternoon
High: 78 °F
Light Wind
< 1ft
Tonight
Low: 75 °F
Light Wind
< 1ft
Wednesday
High: 75 °F
Light Wind
< 1ft
Wednesday Night
Low: 73 °F
Light Wind
< 1ft
Thursday
High: 76 °F
Light Wind
< 1ft
Thursday Night
Low: 71 °F
NE 10kt
1-2ft
Friday
High: 74 °F
NE 10kt
2-3ft
Friday Night
Low: 70 °F
NE 15kt
2ft
Saturday
High: 79 °F
SE 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: 12:21 pm CDT Aug 11, 2026
Forecast Valid: 12pm CDT Aug 11, 2026-6pm CDT Aug 17, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds 5 kt or less. Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. Some of the storms could produce heavy rainfall. Waves 1 ft or less.

Tonight

Variable winds 5 kt or less. A chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers. Waves 1 ft or less.

Wednesday

Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly between 11am and 5pm, then a slight chance of thunderstorms after 5pm. Waves 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. A slight chance of showers before 2am, then a chance of showers after 3am. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. Showers likely, with thunderstorms also possible after 1pm. Waves 1 ft or less.

Thursday Night

NE wind around 10 kt. A chance of showers and thunderstorms. Waves 1 to 2 ft.

Friday

NE wind around 10 kt. A slight chance of showers before 1pm. Waves 2 to 3 ft.

Friday Night

NE wind 10 to 15 kt becoming ESE after midnight. A chance of showers and thunderstorms after 1am. Waves around 2 ft.

Saturday

SE wind around 10 kt, with gusts as high as 15 kt. Showers likely and possibly a thunderstorm before 1pm. 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.