Extreme Heat and Severe Thunderstorms Today

Extreme heat continues today from the central Plains to the lower Mississippi River Valley, over southeast Montana, and from southern California into the Southwest Deserts. Extreme Heat Warnings remain in effect. Severe thunderstorms capable of strong to severe wind gusts and large hail are possible across the Great Lakes into the Ohio Valley today into tonight. Read More >

Hazardous Weather Conditions

For More Weather Information:

Chicago, IL Local Forecast Office

7NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Today
High: 86 °F
SSW 15kt
< 1ft
Tonight
Low: 70 °F
⇑N 25kt
5ft

Small Craft Advisory
Tuesday
High: 72 °F
N 20kt
6ft

Small Craft Advisory
Tuesday Night
Low: 69 °F
N 20kt
4-6ft

Small Craft Advisory
Wednesday
High: 75 °F
N 10kt
2-3ft
Wednesday Night
Low: 69 °F
NNE 10kt
1ft
Thursday
High: 80 °F
Light Wind
< 1ft
Thursday Night
Low: 75 °F
Light Wind
< 1ft
Friday
High: 80 °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: 8:51 am CDT Jul 27, 2026
Forecast Valid: 9am CDT Jul 27, 2026-6pm CDT Aug 2, 2026

View Nearby Observations

Detailed Forecast

Today

SSW wind 10 to 15 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms, mainly between 2pm and 3pm. Waves 1 ft or less.

Tonight

NW wind 10 to 15 kt becoming N 20 to 25 kt after midnight. A chance of showers and thunderstorms, mainly between 7pm and 10pm. Waves 1 ft building to 5 ft.

Tuesday

N wind around 20 kt, with gusts as high as 30 kt. Partly sunny. Waves around 6 ft.

Tuesday Night

N wind 10 to 20 kt, with gusts as high as 25 kt. Mostly clear. Waves 4 to 6 ft. occasionally to 8ft.

Wednesday

N wind around 10 kt. Sunny. Waves 2 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. A chance of showers and thunderstorms after 1am. 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.