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 northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Tonight
Low: 66 °F
Light Wind
1-2ft
Thursday
High: 75 °F
E 10kt
< 1ft
Thursday Night
Low: 68 °F
ESE 10kt
< 1ft
Friday
High: 80 °F
SE 10kt
< 1ft
Friday Night
Low: 69 °F
S 10kt
< 1ft
Saturday
High: 85 °F
SSW 10kt
< 1ft
Saturday Night
Low: 75 °F
SW 10kt
< 1ft
Sunday
High: 89 °F
E 10kt
< 1ft
Sunday Night
Low: 76 °F
WSW 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: 9:46 pm CDT Jul 22, 2026
Forecast Valid: 10pm CDT Jul 22, 2026-6pm CDT Jul 29, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. Mostly clear. Waves 1 to 2 ft.

Thursday

W wind 5 to 10 kt becoming E in the afternoon. Sunny. Waves 1 ft or less.

Thursday Night

ESE wind 5 to 10 kt becoming SSW after midnight. Mostly cloudy. Waves 1 ft or less.

Friday

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

Friday Night

S wind 5 to 10 kt becoming SW after midnight. Partly cloudy. Waves 1 ft or less.

Saturday

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

Saturday Night

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

Sunday

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

Sunday Night

WSW wind 5 to 10 kt becoming SSE in the evening. Partly cloudy. 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.