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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:NE wind 5 to 8 kt increasing to 9 to 12 kt after midnight. Rain likely, mainly before 10pm.  Patchy fog before 4am.  Seas 3 to 4 ft.

      ⇑NE 12kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:ENE wind around 12 kt. Mostly cloudy. Seas around 4 ft.

      ENE 12kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday Night

      Thursday Night:E wind 9 to 12 kt increasing to 13 to 16 kt after midnight. Rain likely, mainly after 1am.   Seas 3 to 4 ft.

      ⇑E 16kt
      3-4ft

    • Friday

      Friday:E wind 17 to 19 kt. Rain.   Seas around 4 ft.

      E 19kt
      4ft

    • Friday Night

      Friday Night:NE wind 10 to 13 kt becoming NW after midnight. Rain likely, mainly before 7pm.   Seas around 4 ft.

      NE 13kt
      4ft

    • Saturday

      Saturday:WNW wind around 10 kt becoming NNE in the afternoon. Partly sunny. Seas 3 to 4 ft.

      WNW 10kt
      3-4ft

    • Saturday Night

      Saturday Night:ENE wind 8 to 12 kt. A chance of rain before 1am, then a chance of rain and snow.   Seas around 3 ft.

      ENE 12kt
      3ft

    • Sunday

      Sunday:ENE wind 15 to 18 kt increasing to 19 to 22 kt in the afternoon. A chance of rain and snow before 1pm, then a chance of snow.   Seas 3 to 4 ft.

      ⇑ENE 22kt
      3-4ft

    • Sunday Night

      Sunday Night:NNE wind around 27 kt. Snow likely.   Seas 5 to 6 ft.

      NNE 27kt
      5-6ft


Associated Zone Forecast which includes this point

Last Update: 12:48 pm EST Feb 18, 2026
Forecast Valid: 8pm EST Feb 18, 2026-6pm EST Feb 25, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EST TONIGHT

Tonight
NE wind 5 to 8 kt increasing to 9 to 12 kt after midnight. Rain likely, mainly before 10pm. Patchy fog before 4am. Seas 3 to 4 ft.
Thursday
ENE wind around 12 kt. Mostly cloudy. Seas around 4 ft.
Thursday Night
E wind 9 to 12 kt increasing to 13 to 16 kt after midnight. Rain likely, mainly after 1am. Seas 3 to 4 ft.
Friday
E wind 17 to 19 kt. Rain. Seas around 4 ft.
Friday Night
NE wind 10 to 13 kt becoming NW after midnight. Rain likely, mainly before 7pm. Seas around 4 ft.
Saturday
WNW wind around 10 kt becoming NNE in the afternoon. Partly sunny. Seas 3 to 4 ft.
Saturday Night
ENE wind 8 to 12 kt. A chance of rain before 1am, then a chance of rain and snow. Seas around 3 ft.
Sunday
ENE wind 15 to 18 kt increasing to 19 to 22 kt in the afternoon. A chance of rain and snow before 1pm, then a chance of snow. Seas 3 to 4 ft.
Sunday Night
NNE wind around 27 kt. Snow likely. Seas 5 to 6 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: 12:48 pm EST Feb 18, 2026
Forecast Valid: 8pm EST Feb 18, 2026-6pm EST Feb 25, 2026
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