Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. 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: 86 °F
SSW 15kt
< 1ft
Monday Night
Low: 70 °F
⇑N 20kt
1-3ft
Tuesday
High: 73 °F
N 20kt
4-6ft
Tuesday Night
Low: 69 °F
N 20kt⇓
4-6ft
Wednesday
High: 76 °F
N 10kt
1-3ft
Wednesday Night
Low: 69 °F
NNE 10kt
1ft
Thursday
High: 82 °F
Light Wind
< 1ft
Thursday Night
Low: 73 °F
Light Wind
< 1ft
Friday
High: 81 °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: 2:16 am CDT Jul 27, 2026
Forecast Valid: 2am CDT Jul 27, 2026-6pm CDT Aug 2, 2026

View Nearby Observations

Detailed Forecast

Monday

SSW wind 5 to 15 kt, with gusts as high as 20 kt. Showers and thunderstorms likely before 11am, then showers likely and possibly a thunderstorm between 11am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall. Waves 1 ft or less.

Monday Night

NW wind 10 to 15 kt becoming N 15 to 20 kt after midnight. A chance of showers and thunderstorms, mainly between 11pm and midnight. Waves 1 to 3 ft.

Tuesday

N wind around 20 kt, with gusts as high as 25 kt. Partly sunny. Waves 4 to 6 ft. occasionally to 8ft.

Tuesday Night

N wind 15 to 20 kt decreasing to 10 to 15 kt after midnight. Mostly clear. Waves 4 to 6 ft. occasionally to 8ft.

Wednesday

N wind around 10 kt. Sunny. Waves 1 to 3 ft.

Wednesday Night

NNE wind 5 to 10 kt. Mostly clear. Waves around 1 ft.

Thursday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Thursday Night

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

Friday

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

*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.