For More Weather Information:

Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]

Wednesday
High: 77 °F
Light Wind
< 1ft
Wednesday Night
Low: 72 °F
Light Wind
< 1ft
Thursday
High: 74 °F
Light Wind
< 1ft
Thursday Night
Low: 73 °F
NE 10kt
1-2ft
Friday
High: 75 °F
NE 10kt
2ft
Friday Night
Low: 73 °F
NNE 10kt
2ft
Saturday
High: 81 °F
SE 10kt
1-2ft
Saturday Night
Low: 72 °F
SSE 10kt
< 1ft
Sunday
High: 82 °F
NNW 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: 1:20 am CDT Aug 12, 2026
Forecast Valid: 1am CDT Aug 12, 2026-6pm CDT Aug 18, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds 5 kt or less. Showers and thunderstorms likely, mainly before 3pm. Some of the storms could be severe and produce heavy rainfall. Patchy fog before 9am. Waves 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 1pm. Waves 1 ft or less.

Thursday Night

NE wind around 10 kt. Showers likely and possibly a thunderstorm. Waves 1 to 2 ft.

Friday

NE wind around 10 kt. Partly sunny. Waves around 2 ft.

Friday Night

NNE wind around 10 kt becoming ESE after midnight. A chance of showers and thunderstorms, mainly after 1am. Waves around 2 ft.

Saturday

SE wind around 10 kt. Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Waves 1 to 2 ft.

Saturday Night

SSE wind around 10 kt becoming SW after midnight. A chance of showers and thunderstorms. Waves 1 ft or less.

Sunday

WSW wind around 10 kt becoming N in the afternoon. A chance of showers and thunderstorms. 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.