Areas of Dangerous Heat and Heavy Rainfall Today

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley today. Heat Advisories remain in effect. Heavy to excessive rainfall today could bring areas of flooding to parts of the northern High Plains and Midwest into the Ohio Valley. Flood Watches remain in effect. Read More >

Hazardous Weather Conditions

For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

This Afternoon
High: 64 °F
NE 25kt
8ft

Small Craft Advisory
Tonight
Low: 60 °F
ENE 20kt
7-8ft

Small Craft Advisory
Monday
High: 65 °F
ENE 20kt
7ft

Small Craft Advisory
Monday Night
Low: 57 °F
ENE 20kt
6-8ft

Small Craft Advisory
Tuesday
High: 64 °F
NE 20kt
6-7ft

Small Craft Advisory
Tuesday Night
Low: 58 °F
ENE 20kt
5-7ft

Small Craft Advisory
Wednesday
High: 65 °F
ENE 15kt
5ft

Small Craft Advisory
Wednesday Night
Low: 58 °F
ENE 20kt
3-5ft
Thursday
High: 66 °F
ENE 15kt
2-3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:46 pm CDT Sep 20, 2026
Forecast Valid: 4pm CDT Sep 20, 2026-6pm CDT Sep 27, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

NE wind around 25 kt. Showers. Waves around 8 ft.

Tonight

ENE wind around 20 kt, with gusts as high as 30 kt. Showers likely, mainly before 1am. Waves 7 to 8 ft. occasionally to 10ft.

Monday

ENE wind 15 to 20 kt. A slight chance of showers before 1pm. Waves around 7 ft.

Monday Night

ENE wind 15 to 20 kt. Cloudy. Waves 6 to 8 ft. occasionally to 10ft.

Tuesday

NE wind 15 to 20 kt. Partly sunny. Waves 6 to 7 ft. occasionally to 9ft.

Tuesday Night

ENE wind 15 to 20 kt. Partly cloudy. Waves 5 to 7 ft. occasionally to 9ft.

Wednesday

ENE wind around 15 kt. Partly sunny. Waves around 5 ft.

Wednesday Night

ENE wind 15 to 20 kt. Partly cloudy. Waves 3 to 5 ft.

Thursday

ENE wind 10 to 15 kt. Partly sunny. Waves 2 to 3 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.