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]

Sunday
High: 69 °F
⇑NE 25kt
8ft

Small Craft Advisory
Sunday Night
Low: 60 °F
ENE 25kt
7-8ft

Small Craft Advisory
Monday
High: 64 °F
ENE 25kt
7ft

Small Craft Advisory
Monday Night
Low: 58 °F
ENE 25kt
6-8ft

Small Craft Advisory
Tuesday
High: 62 °F
ENE 20kt
6-7ft

Small Craft Advisory
Tuesday Night
Low: 58 °F
NE 25kt
5-7ft
Wednesday
High: 62 °F
NE 20kt
5ft
Wednesday Night
Low: 57 °F
ENE 20kt
3-5ft
Thursday
High: 65 °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: 3:36 am CDT Sep 20, 2026
Forecast Valid: 4am CDT Sep 20, 2026-6pm CDT Sep 26, 2026

View Nearby Observations

Detailed Forecast

Sunday

NE wind 10 to 15 kt increasing to 20 to 25 kt in the afternoon. Showers and possibly a thunderstorm before 4pm, then a chance of showers. Some of the storms could produce heavy rainfall. Areas of dense fog before 10am. Waves 1 ft building to 8 ft.

Sunday Night

ENE wind around 25 kt. A chance of showers, mainly after 5am. Waves 7 to 8 ft. occasionally to 10ft.

Monday

ENE wind 20 to 25 kt. A chance of showers, mainly before 9am. Waves around 7 ft.

Monday Night

ENE wind 20 to 25 kt. A slight chance of showers after 1am. Waves 6 to 8 ft. occasionally to 10ft.

Tuesday

ENE wind around 20 kt. A slight chance of showers before 1pm. Waves 6 to 7 ft. occasionally to 9ft.

Tuesday Night

NE wind 20 to 25 kt. Mostly cloudy. Waves 5 to 7 ft. occasionally to 9ft.

Wednesday

NE wind 15 to 20 kt. Partly sunny. Waves around 5 ft.

Wednesday Night

ENE wind 15 to 20 kt. Mostly 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.