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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]
    • Late Afternoon

      Late Afternoon:SSW wind around 6 kt. A chance of showers and thunderstorms.   Seas 1 ft or less.

      SSW 6kt
      < 1ft

    • Tonight

      Tonight:SSW wind around 6 kt becoming variable and less than 5 kt. Showers and thunderstorms likely before 2am, then a slight chance of showers.   Seas 1 ft or less.

      SSW 6kt⇓
      < 1ft

    • Saturday

      Saturday:WSW wind around 8 kt. A chance of showers and thunderstorms, mainly after 5pm.   Seas 1 ft or less.

      WSW 8kt
      < 1ft

    • Saturday Night

      Saturday Night:SSW wind around 7 kt becoming WSW after midnight. A chance of showers and thunderstorms before 11pm.   Seas 1 ft or less.

      SSW 7kt
      < 1ft

    • Sunday

      Sunday:W wind around 7 kt. Sunny. Seas 1 ft or less.

      W 7kt
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 6kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 5 to 7 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

      SSW 7kt
      < 1ft

    • Tuesday

      Tuesday:W wind 6 to 8 kt. A chance of showers.   Seas 1 ft or less.

      W 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 3:38 pm EDT Aug 7, 2026
Forecast Valid: 5pm EDT Aug 7, 2026-6pm EDT Aug 14, 2026

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Detailed Forecast

...SEVERE THUNDERSTORM WATCH 540 IN EFFECT UNTIL 9 PM EDT THIS

Late Afternoon
SSW wind around 6 kt. A chance of showers and thunderstorms. Seas 1 ft or less.
Tonight
SSW wind around 6 kt becoming variable and less than 5 kt. Showers and thunderstorms likely before 2am, then a slight chance of showers. Seas 1 ft or less.
Saturday
WSW wind around 8 kt. A chance of showers and thunderstorms, mainly after 5pm. Seas 1 ft or less.
Saturday Night
SSW wind around 7 kt becoming WSW after midnight. A chance of showers and thunderstorms before 11pm. Seas 1 ft or less.
Sunday
W wind around 7 kt. Sunny. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Sunny. Seas 1 ft or less.
Monday Night
SSW wind 5 to 7 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.
Tuesday
W wind 6 to 8 kt. A chance of showers. Seas 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: 40.91°N 73.39°W
Last Update: 3:38 pm EDT Aug 7, 2026
Forecast Valid: 5pm EDT Aug 7, 2026-6pm EDT Aug 14, 2026
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