Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. 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]

Monday
High: 85 °F
SSW 10kt
1ft
Monday Night
Low: 76 °F
SSW 10kt
< 1ft
Tuesday
High: 86 °F
SW 10kt
< 1ft
Tuesday Night
Low: 76 °F
Light Wind
< 1ft
Wednesday
High: 88 °F
SW 15kt
< 1ft
Wednesday Night
Low: 75 °F
SW 10kt
< 1ft
Thursday
High: 84 °F
Light Wind
< 1ft
Thursday Night
Low: 74 °F
E 10kt
1ft
Friday
High: 83 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:21 am CDT Aug 31, 2026
Forecast Valid: 2am CDT Aug 31, 2026-6pm CDT Sep 6, 2026

View Nearby Observations

Detailed Forecast

Monday

SSW wind around 10 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms, mainly before 1pm. Waves around 1 ft.

Monday Night

SSW wind 5 to 10 kt. A slight chance of showers and thunderstorms before 10pm. Waves 1 ft or less.

Tuesday

SW wind 5 to 10 kt. A slight chance of showers and thunderstorms between 10am and 1pm. Waves 1 ft or less.

Tuesday Night

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

Wednesday

SW wind 5 to 15 kt. Sunny. Waves 1 ft or less.

Wednesday Night

SW wind 5 to 10 kt becoming NW after midnight. A chance of showers and thunderstorms after 1am. Waves 1 ft or less.

Thursday

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

Thursday Night

E wind 5 to 10 kt. Partly cloudy. Waves around 1 ft.

Friday

Variable winds 5 kt or less. 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.