Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

For More Weather Information:

Chicago, IL Local Forecast Office

17NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Tonight
Low: 64 °F
ESE 20kt
2-3ft
Saturday
High: 72 °F
SSE 20kt
4ft
Saturday Night
Low: 69 °F
NNE 15kt
1-2ft
Sunday
High: 71 °F
⇑NE 25kt
8ft
Sunday Night
Low: 64 °F
ENE 25kt
7-9ft
Monday
High: 68 °F
ENE 25kt
6-8ft
Monday Night
Low: 61 °F
ENE 30kt
6-8ft
Tuesday
High: 67 °F
NE 25kt
6-7ft
Tuesday Night
Low: 62 °F
NE 25kt
4-6ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:33 pm CDT Sep 18, 2026
Forecast Valid: 9pm CDT Sep 18, 2026-6pm CDT Sep 25, 2026

View Nearby Observations

Detailed Forecast

Tonight

ESE wind 15 to 20 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Waves 2 to 3 ft.

Saturday

SSE wind 10 to 20 kt. Showers and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Waves 4 ft subsiding to 1 ft.

Saturday Night

SE wind 10 to 15 kt becoming N after midnight. Showers and possibly a thunderstorm. Waves 1 to 2 ft.

Sunday

NE wind 15 to 20 kt increasing to 20 to 25 kt in the afternoon. Showers likely, mainly before 1pm. Waves 3 ft building to 8 ft.

Sunday Night

ENE wind around 25 kt. A chance of showers, mainly after 1am. Waves 7 to 9 ft. occasionally to 12ft.

Monday

ENE wind around 25 kt, with gusts as high as 30 kt. A chance of showers. Waves 6 to 8 ft. occasionally to 10ft.

Monday Night

ENE wind 20 to 30 kt. A slight chance of showers after 1am. Waves 6 to 8 ft. occasionally to 10ft.

Tuesday

NE wind 20 to 25 kt. Mostly cloudy. Waves 6 to 7 ft. occasionally to 9ft.

Tuesday Night

NE wind 15 to 25 kt. Mostly cloudy. Waves 4 to 6 ft. occasionally to 8ft.

*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.