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New York, NY Local Forecast Office

9NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:NNW wind 15 to 17 kt, with gusts as high as 23 kt. Cloudy during the early evening, then gradual clearing. Seas 1 ft or less.

      NNW 17kt
      < 1ft

    • Wednesday

      Wednesday:NNW wind 7 to 12 kt becoming WNW in the afternoon. Sunny. Seas 1 ft or less.

      NNW 12kt
      < 1ft

    • Wednesday Night

      Wednesday Night:W wind 7 to 10 kt increasing to 10 to 13 kt after midnight. Mostly clear. Seas 1 ft or less.

      ⇑W 13kt
      < 1ft

    • Thursday

      Thursday:W wind 14 to 19 kt becoming WNW in the afternoon. Winds could gust as high as 27 kt. Mostly sunny. Seas 1 ft or less.

      WNW 19kt
      < 1ft

    • Thursday Night

      Thursday Night:NW wind 15 to 20 kt decreasing to 9 to 14 kt after midnight. Winds could gust as high as 27 kt. Mostly clear. Seas 1 ft or less.

      NW 20kt⇓
      < 1ft

    • Friday

      Friday:N wind 7 to 9 kt becoming S in the afternoon. Partly sunny. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Friday Night

      Friday Night:WSW wind around 8 kt becoming N after midnight. A chance of rain and snow before 1am, then a chance of rain.   Seas 1 ft or less.

      WSW 8kt
      < 1ft

    • Saturday

      Saturday:N wind 7 to 10 kt becoming W in the afternoon. A chance of rain.   Seas 1 ft or less.

      WNW 10kt
      < 1ft

    • Saturday Night

      Saturday Night:W wind around 10 kt. Partly cloudy. Seas 1 ft or less.

      W 10kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 5:30 pm EST Dec 2, 2025
Forecast Valid: 8pm EST Dec 2, 2025-6pm EST Dec 9, 2025

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON...

Tonight
NNW wind 15 to 17 kt, with gusts as high as 23 kt. Cloudy during the early evening, then gradual clearing. Seas 1 ft or less.
Wednesday
NNW wind 7 to 12 kt becoming WNW in the afternoon. Sunny. Seas 1 ft or less.
Wednesday Night
W wind 7 to 10 kt increasing to 10 to 13 kt after midnight. Mostly clear. Seas 1 ft or less.
Thursday
W wind 14 to 19 kt becoming WNW in the afternoon. Winds could gust as high as 27 kt. Mostly sunny. Seas 1 ft or less.
Thursday Night
NW wind 15 to 20 kt decreasing to 9 to 14 kt after midnight. Winds could gust as high as 27 kt. Mostly clear. Seas 1 ft or less.
Friday
N wind 7 to 9 kt becoming S in the afternoon. Partly sunny. Seas 1 ft or less.
Friday Night
WSW wind around 8 kt becoming N after midnight. A chance of rain and snow before 1am, then a chance of rain. Seas 1 ft or less.
Saturday
N wind 7 to 10 kt becoming W in the afternoon. A chance of rain. Seas 1 ft or less.
Saturday Night
W wind around 10 kt. Partly cloudy. 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: 40.64°N 73.36°W
Last Update: 5:30 pm EST Dec 2, 2025
Forecast Valid: 8pm EST Dec 2, 2025-6pm EST Dec 9, 2025
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