Hazardous Weather Conditions

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Chicago, IL Local Forecast Office

4NM ENE Chicago IL

Marine Point Forecast

[NOTICE]
    • Sunday

      Sunday:WNW wind 5 to 10 kt. A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 2pm.   Waves 1 ft or less.

      High: 79 °F

      WNW 10kt
      < 1ft

    • Sunday Night

      Sunday Night:WNW wind around 10 kt becoming N after midnight. Mostly cloudy. Waves 1 to 2 ft.

      Low: 71 °F

      NNW 10kt
      1-2ft

    • Monday

      Monday:NNE wind 5 to 10 kt. Mostly sunny. Waves 1 to 2 ft.

      High: 75 °F

      NNE 10kt
      1-2ft

    • Monday Night

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

      Low: 69 °F

      Light Wind
      < 1ft

    • Tuesday

      Tuesday:SW wind 5 to 10 kt. A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.   Waves 1 ft or less.

      High: 82 °F

      SW 10kt
      < 1ft

    • Tuesday Night

      Tuesday Night:Variable winds 5 kt or less. Winds could gust as high as 10 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.   Waves 1 ft or less.

      Low: 69 °F

      Light Wind
      < 1ft

    • Wednesday

      Wednesday:NNE wind 5 to 10 kt. A chance of showers and thunderstorms before 1pm, then a slight chance of showers.   Waves 1 to 2 ft.

      High: 73 °F

      NNE 10kt
      1-2ft

    • Wednesday Night

      Wednesday Night:NE wind 5 to 10 kt. Partly cloudy. Waves 1 to 2 ft.

      Low: 66 °F

      NE 10kt
      1-2ft

    • Thursday

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

      High: 76 °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: 2:36 am CDT Aug 16, 2026
Forecast Valid: 2am CDT Aug 16, 2026-6pm CDT Aug 22, 2026

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Detailed Forecast

Sunday
WNW wind 5 to 10 kt. A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 2pm. Waves 1 ft or less.
Sunday Night
WNW wind around 10 kt becoming N after midnight. Mostly cloudy. Waves 1 to 2 ft.
Monday
NNE wind 5 to 10 kt. Mostly sunny. Waves 1 to 2 ft.
Monday Night
Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.
Tuesday
SW wind 5 to 10 kt. A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Waves 1 ft or less.
Tuesday Night
Variable winds 5 kt or less. Winds could gust as high as 10 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Waves 1 ft or less.
Wednesday
NNE wind 5 to 10 kt. A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Waves 1 to 2 ft.
Wednesday Night
NE wind 5 to 10 kt. Partly cloudy. Waves 1 to 2 ft.
Thursday
Variable winds 5 kt or less. Mostly sunny. Waves around 1 ft.

*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: 2:36 am CDT Aug 16, 2026
Forecast Valid: 2am CDT Aug 16, 2026-6pm CDT Aug 22, 2026
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