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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]
    • Overnight

      Overnight:W wind around 7 kt. Clear. Seas 1 ft or less.

      W 7kt
      < 1ft

    • Tuesday

      Tuesday:W wind around 9 kt. A slight chance of showers and thunderstorms after 5pm.   Seas 1 ft or less.

      W 9kt
      < 1ft

    • Tuesday Night

      Tuesday Night:WNW wind 6 to 8 kt. A slight chance of showers and thunderstorms before 8pm.   Seas 1 ft or less.

      WNW 8kt
      < 1ft

    • Wednesday

      Wednesday:NNW wind around 6 kt becoming variable and less than 5 kt in the afternoon. Sunny. Seas 1 ft or less.

      NNW 6kt⇓
      < 1ft

    • Wednesday Night

      Wednesday Night:S wind around 8 kt. Partly cloudy. Seas 1 ft or less.

      S 8kt
      < 1ft

    • Thursday

      Thursday:S wind 7 to 11 kt. A chance of showers, with thunderstorms also possible after 2pm.   Seas 1 ft or less.

      S 11kt
      < 1ft

    • Thursday Night

      Thursday Night:S wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Showers likely and possibly a thunderstorm.   Seas 1 ft or less.

      S 9kt⇓
      < 1ft

    • Friday

      Friday:Variable winds 5 kt or less. A chance of showers.   Seas 1 ft or less.

      Light Wind
      < 1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

      Light Wind
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:49 pm EDT Aug 24, 2026
Forecast Valid: 12am EDT Aug 25, 2026-6pm EDT Aug 31, 2026

View Nearby Observations

Detailed Forecast


Overnight
W wind around 7 kt. Clear. Seas 1 ft or less.
Tuesday
W wind around 9 kt. A slight chance of showers and thunderstorms after 5pm. Seas 1 ft or less.
Tuesday Night
WNW wind 6 to 8 kt. A slight chance of showers and thunderstorms before 8pm. Seas 1 ft or less.
Wednesday
NNW wind around 6 kt becoming variable and less than 5 kt in the afternoon. Sunny. Seas 1 ft or less.
Wednesday Night
S wind around 8 kt. Partly cloudy. Seas 1 ft or less.
Thursday
S wind 7 to 11 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Thursday Night
S wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Showers likely and possibly a thunderstorm. Seas 1 ft or less.
Friday
Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.
Friday Night
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

Winds and seas may be higher in and near tstms.

*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: 2:49 pm EDT Aug 24, 2026
Forecast Valid: 12am EDT Aug 25, 2026-6pm EDT Aug 31, 2026
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