Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northwestern Gulf Coast from south central Louisiana to the upper Texas coast today. Read More >

For More Weather Information:

Chicago, IL Local Forecast Office

17NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Today
High: 78 °F
Light Wind
< 1ft
Tonight
Low: 71 °F
Light Wind
< 1ft
Friday
High: 82 °F
Light Wind
< 1ft
Friday Night
Low: 73 °F
S 10kt
< 1ft
Saturday
High: 84 °F
SSW 10kt
< 1ft
Saturday Night
Low: 77 °F
SSW 10kt
< 1ft
Sunday
High: 88 °F
W 10kt
< 1ft
Sunday Night
Low: 79 °F
SSW 10kt
< 1ft
Monday
High: 87 °F
SW 10kt
1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 5:03 am CDT Jul 23, 2026
Forecast Valid: 6am CDT Jul 23, 2026-6pm CDT Jul 29, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

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

Friday

Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

Friday Night

SE wind around 10 kt becoming SW after midnight. Mostly clear. Waves 1 ft or less.

Saturday

SSW wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.

Saturday Night

SSW wind around 10 kt becoming WSW after midnight. Partly cloudy. Waves 1 ft or less.

Sunday

W wind 5 to 10 kt becoming SE in the afternoon. Mostly sunny. Waves 1 ft or less.

Sunday Night

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

Monday

SW wind around 10 kt, with gusts as high as 15 kt. A chance of showers, with thunderstorms also possible after 1pm. 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.