Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. 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: 70 °F
SE 10kt
1ft
Tonight
Low: 68 °F
Light Wind
< 1ft
Sunday
High: 68 °F
NE 20kt
6ft

Small Craft Advisory
Sunday Night
Low: 60 °F
ENE 25kt
6-7ft

Small Craft Advisory
Monday
High: 65 °F
ENE 25kt
6ft

Small Craft Advisory
Monday Night
Low: 57 °F
ENE 25kt
6-7ft

Small Craft Advisory
Tuesday
High: 63 °F
ENE 20kt
6-7ft

Small Craft Advisory
Tuesday Night
Low: 58 °F
ENE 25kt
5-7ft
Wednesday
High: 64 °F
NE 15kt
5ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:21 pm CDT Sep 19, 2026
Forecast Valid: 4pm CDT Sep 19, 2026-6pm CDT Sep 26, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 10 kt. Showers likely and possibly a thunderstorm. Waves around 1 ft.

Tonight

Variable winds 5 kt or less. Showers and possibly a thunderstorm. Waves 1 ft or less.

Sunday

NE wind 15 to 20 kt, with gusts as high as 25 kt. Showers and possibly a thunderstorm before 1pm, then a chance of showers. Waves 2 ft building to 6 ft.

Sunday Night

ENE wind 20 to 25 kt. A slight chance of showers before 8pm. Waves 6 to 7 ft. occasionally to 9ft.

Monday

ENE wind 20 to 25 kt. A chance of showers. Waves around 6 ft.

Monday Night

ENE wind 20 to 25 kt. Cloudy. Waves 6 to 7 ft. occasionally to 9ft.

Tuesday

ENE wind around 20 kt. A slight chance of showers. Waves 6 to 7 ft. occasionally to 9ft.

Tuesday Night

ENE wind 15 to 25 kt. Mostly cloudy. Waves 5 to 7 ft. occasionally to 9ft.

Wednesday

NE wind around 15 kt. Mostly cloudy. Waves around 5 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.