Hazardous Weather Conditions

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Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]
    • Monday

      Monday:NNW wind 5 to 10 kt becoming NE in the afternoon. A slight chance of showers after 10am.   Waves 1 to 2 ft.

      High: 73 °F

      NNW 10kt
      1-2ft

    • Monday Night

      Monday Night:Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

      Low: 66 °F

      Light Wind
      < 1ft

    • Tuesday

      Tuesday:WSW wind 5 to 10 kt. A chance of showers and thunderstorms after 1pm.   Waves 1 ft or less.

      High: 80 °F

      WSW 10kt
      < 1ft

    • Tuesday Night

      Tuesday Night:WSW wind 5 to 10 kt becoming NW after midnight. Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.   Waves 1 ft or less.

      Low: 69 °F

      WSW 10kt
      < 1ft

    • Wednesday

      Wednesday:NNW wind 5 to 10 kt becoming NNE in the afternoon. Partly sunny. Waves 1 ft or less.

      High: 74 °F

      NNE 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:NE wind 5 to 10 kt. Partly cloudy. Waves around 1 ft.

      Low: 70 °F

      NE 10kt
      1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

      High: 74 °F

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:NE wind 5 to 10 kt becoming SSE after midnight. Partly cloudy. Waves 1 ft or less.

      Low: 67 °F

      NE 10kt
      < 1ft

    • Friday

      Friday:Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

      High: 78 °F

      Light Wind
      < 1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:31 am CDT Aug 17, 2026
Forecast Valid: 3am CDT Aug 17, 2026-6pm CDT Aug 23, 2026

View Nearby Observations

Detailed Forecast

Monday
NNW wind 5 to 10 kt becoming NE in the afternoon. A slight chance of showers after 10am. Waves 1 to 2 ft.
Monday Night
Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.
Tuesday
WSW wind 5 to 10 kt. A chance of showers and thunderstorms after 1pm. Waves 1 ft or less.
Tuesday Night
WSW wind 5 to 10 kt becoming NW after midnight. Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Waves 1 ft or less.
Wednesday
NNW wind 5 to 10 kt becoming NNE in the afternoon. Partly sunny. Waves 1 ft or less.
Wednesday Night
NE wind 5 to 10 kt. Partly cloudy. Waves around 1 ft.
Thursday
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Thursday Night
NE wind 5 to 10 kt becoming SSE after midnight. Partly cloudy. Waves 1 ft or less.
Friday
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 41.85°N 87.59°W
Last Update: 3:31 am CDT Aug 17, 2026
Forecast Valid: 3am CDT Aug 17, 2026-6pm CDT Aug 23, 2026
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