Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Overnight
Low: 68 °F
NE 15kt
2-3ft
Friday
High: 70 °F
E 15kt
2-3ft
Friday Night
Low: 66 °F
SE 15kt
2-3ft
Saturday
High: 72 °F
SSE 15kt
1-2ft
Saturday Night
Low: 66 °F
NNE 10kt
1-2ft
Sunday
High: 68 °F
NE 20kt
7ft
Sunday Night
Low: 60 °F
ENE 25kt
6-7ft
Monday
High: 65 °F
ENE 25kt
6-8ft
Monday Night
Low: 59 °F
ENE 30kt
7-9ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:21 pm CDT Sep 17, 2026
Forecast Valid: 11pm CDT Sep 17, 2026-6pm CDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

Overnight

NE wind 10 to 15 kt. Mostly cloudy. Waves 2 to 3 ft.

Friday

E wind 10 to 15 kt. Partly sunny. Waves 2 to 3 ft.

Friday Night

E wind 10 to 15 kt becoming SE in the evening. A chance of showers and thunderstorms between 1am and 5am, then showers likely and possibly a thunderstorm after 5am. Waves 2 to 3 ft.

Saturday

SSE wind 5 to 15 kt. Showers and possibly a thunderstorm. Waves 1 to 2 ft.

Saturday Night

E wind around 10 kt becoming NNE after midnight. Showers and possibly a thunderstorm. Waves 1 to 2 ft.

Sunday

NE wind 15 to 20 kt. Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Waves 3 ft building to 7 ft.

Sunday Night

ENE wind 20 to 25 kt. Showers likely, mainly after 1am. Waves 6 to 7 ft. occasionally to 9ft.

Monday

ENE wind 20 to 25 kt. Showers likely. Waves 6 to 8 ft. occasionally to 10ft.

Monday Night

ENE wind 20 to 30 kt. A chance of showers. Waves 7 to 9 ft. occasionally to 12ft.

*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.