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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Wednesday

      Wednesday:SSW wind 11 to 16 kt. A slight chance of showers before 7am.   Seas 4 to 5 ft.

      SSW 16kt
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Wednesday Night

      Wednesday Night:S wind 10 to 15 kt becoming W after midnight. A chance of showers, mainly after 10pm.   Seas 3 to 4 ft.

      W 15kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:W wind 17 to 20 kt increasing to 21 to 24 kt in the afternoon. A slight chance of snow showers before 1pm.   Seas 4 ft building to 6 ft.

      ⇑W 24kt
      Waves Building6ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday Night

      Thursday Night:W wind 25 to 27 kt. Partly cloudy. Seas around 6 ft.

      W 27kt
      6ft

    • Friday

      Friday:W wind 23 to 26 kt becoming WSW 20 to 23 kt in the afternoon. Mostly sunny. Seas 6 ft subsiding to 4 ft.

      W 26kt⇓
      6ftWaves Subsiding

    • Friday Night

      Friday Night:SW wind 18 to 22 kt. Mostly cloudy. Seas 5 to 6 ft.

      SW 22kt
      5-6ft

    • Saturday

      Saturday:SW wind around 16 kt. A chance of rain after 1pm.   Seas around 5 ft.

      SW 16kt
      5ft

    • Saturday Night

      Saturday Night:WSW wind around 15 kt becoming W after midnight. Mostly cloudy. Seas 4 to 5 ft.

      WSW 15kt
      4-5ft

    • Sunday

      Sunday:W wind 16 to 19 kt. Partly sunny. Seas around 4 ft.

      W 19kt
      4ft


Associated Zone Forecast which includes this point

Last Update: 1:35 am EST Jan 14, 2026
Forecast Valid: 2am EST Jan 14, 2026-6pm EST Jan 20, 2026

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Detailed Forecast

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

Wednesday
SSW wind 11 to 16 kt. A slight chance of showers before 7am. Seas 4 to 5 ft.
Wednesday Night
S wind 10 to 15 kt becoming W after midnight. A chance of showers, mainly after 10pm. Seas 3 to 4 ft.
Thursday
W wind 17 to 20 kt increasing to 21 to 24 kt in the afternoon. A slight chance of snow showers before 1pm. Seas 4 ft building to 6 ft.
Thursday Night
W wind 25 to 27 kt. Partly cloudy. Seas around 6 ft.
Friday
W wind 23 to 26 kt becoming WSW 20 to 23 kt in the afternoon. Mostly sunny. Seas 6 ft subsiding to 4 ft.
Friday Night
SW wind 18 to 22 kt. Mostly cloudy. Seas 5 to 6 ft.
Saturday
SW wind around 16 kt. A chance of rain after 1pm. Seas around 5 ft.
Saturday Night
WSW wind around 15 kt becoming W after midnight. Mostly cloudy. Seas 4 to 5 ft.
Sunday
W wind 16 to 19 kt. Partly sunny. Seas around 4 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: 40.53°N 73.44°W
Last Update: 1:35 am EST Jan 14, 2026
Forecast Valid: 2am EST Jan 14, 2026-6pm EST Jan 20, 2026
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