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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:S wind around 10 kt. Partly sunny. Seas 1 ft or less.

      S 10kt
      < 1ft

    • Tonight

      Tonight:SSW wind 13 to 15 kt, with gusts as high as 25 kt. A slight chance of showers after 5am.   Seas 1 ft or less.

      SSW 15kt
      < 1ft

    • Thursday

      Thursday:W wind 8 to 11 kt, with gusts as high as 20 kt. A slight chance of showers before 8am.   Seas 1 ft or less.

      W 11kt
      < 1ft

    • Thursday Night

      Thursday Night:NNW wind 5 to 7 kt. Mostly cloudy. Seas 1 ft or less.

      NNW 7kt
      < 1ft

    • Friday

      Friday:N wind 5 to 7 kt becoming variable and less than 5 kt in the afternoon. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.

      N 7kt⇓
      < 1ft

    • Friday Night

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

      Light Wind
      < 1ft

    • Saturday

      Saturday:Variable winds less than 5 kt becoming SSE around 6 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑SSE 6kt
      < 1ft

    • Saturday Night

      Saturday Night:S wind 6 to 8 kt. A chance of showers.   Seas 1 ft or less.

      S 8kt
      < 1ft

    • Sunday

      Sunday:SSE wind around 6 kt becoming SSW in the afternoon. A chance of showers.   Seas 1 ft or less.

      SSE 6kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:02 pm EDT Sep 9, 2026
Forecast Valid: 3pm EDT Sep 9, 2026-6pm EDT Sep 16, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING...

This Afternoon
S wind around 10 kt. Partly sunny. Seas 1 ft or less.
Tonight
SSW wind 13 to 15 kt, with gusts as high as 25 kt. A slight chance of showers after 5am. Seas 1 ft or less.
Thursday
W wind 8 to 11 kt, with gusts as high as 20 kt. A slight chance of showers before 8am. Seas 1 ft or less.
Thursday Night
NNW wind 5 to 7 kt. Mostly cloudy. Seas 1 ft or less.
Friday
N wind 5 to 7 kt becoming variable and less than 5 kt in the afternoon. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.
Friday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Saturday
Variable winds less than 5 kt becoming SSE around 6 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Saturday Night
S wind 6 to 8 kt. A chance of showers. Seas 1 ft or less.
Sunday
SSE wind around 6 kt becoming SSW in the afternoon. 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: 2:02 pm EDT Sep 9, 2026
Forecast Valid: 3pm EDT Sep 9, 2026-6pm EDT Sep 16, 2026
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