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

5NM NE Chicago IL

Marine Point Forecast

[NOTICE]

This Afternoon
High: 70 °F
ENE 15kt
2ft
Tonight
Low: 64 °F
ESE 15kt
2-3ft

Small Craft Advisory
Saturday
High: 72 °F
ESE 20kt
1-3ft

Small Craft Advisory
Saturday Night
Low: 65 °F
N 10kt
< 1ft
Sunday
High: 68 °F
NE 25kt
7ft
Sunday Night
Low: 59 °F
ENE 25kt
6-7ft
Monday
High: 63 °F
ENE 25kt
6-7ft
Monday Night
Low: 57 °F
ENE 30kt
6-7ft
Tuesday
High: 62 °F
ENE 20kt
6ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:51 pm CDT Sep 18, 2026
Forecast Valid: 3pm CDT Sep 18, 2026-6pm CDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

ENE wind around 15 kt. A chance of showers, mainly before 5pm. Waves around 2 ft.

Tonight

ENE wind around 15 kt becoming ESE after midnight. Winds could gust as high as 20 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1am. Waves 2 to 3 ft.

Saturday

ESE wind 10 to 20 kt becoming S in the afternoon. Showers and thunderstorms, mainly before 1pm. Waves 1 to 3 ft.

Saturday Night

ESE wind around 10 kt becoming W in the evening. Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Waves 1 ft or less.

Sunday

NE wind 15 to 25 kt. Showers likely and possibly a thunderstorm. Waves 2 ft building to 7 ft.

Sunday Night

ENE wind around 25 kt. A chance of showers. Waves 6 to 7 ft. occasionally to 9ft.

Monday

ENE wind around 25 kt. A chance of showers. Waves 6 to 7 ft. occasionally to 9ft.

Monday Night

ENE wind 20 to 30 kt. Mostly cloudy. Waves 6 to 7 ft. occasionally to 9ft.

Tuesday

ENE wind around 20 kt. Mostly cloudy. Waves around 6 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.