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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:WNW wind 13 to 16 kt becoming NNW 8 to 11 kt after midnight. Winds could gust as high as 26 kt. Increasing clouds. Seas 5 ft subsiding to 2 ft.

      WNW 16kt⇓
      5ftWaves Subsiding

    • Sunday

      Sunday:ENE wind 10 to 15 kt becoming ESE in the afternoon. Partly sunny. Seas around 2 ft.

      ESE 15kt
      2ft

    • Sunday Night

      Sunday Night:ESE wind 13 to 16 kt increasing to 18 to 21 kt after midnight. Winds could gust as high as 30 kt. Showers, mainly after 2am.   Seas 2 ft building to 4 ft.

      ⇑ESE 21kt
      Waves Building4ft

    • Monday

      Monday:S wind 24 to 28 kt, with gusts as high as 39 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall.   Seas 7 ft building to 11 ft.

      S 28kt
      Waves Building11ft

    • Monday Night

      Monday Night:S wind 32 to 35 kt becoming SW 28 to 31 kt after midnight. Winds could gust as high as 44 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall.   Seas 15 ft subsiding to 13 ft.

      S 35kt⇓
      15ftWaves Subsiding

    • Tuesday

      Tuesday:W wind 24 to 28 kt, with gusts as high as 34 kt. A chance of showers before 8am.   Seas 10 ft subsiding to 8 ft.

      W 28kt
      10ftWaves Subsiding

    • Tuesday Night

      Tuesday Night:WNW wind 23 to 26 kt decreasing to 18 to 21 kt after midnight. Partly cloudy. Seas 7 ft subsiding to 5 ft.

      WNW 26kt⇓
      7ftWaves Subsiding

    • Wednesday

      Wednesday:NW wind 6 to 11 kt becoming SW in the afternoon. Mostly sunny. Seas around 4 ft.

      NW 11kt
      4ft

    • Wednesday Night

      Wednesday Night:S wind 9 to 11 kt. Mostly cloudy. Seas 3 to 4 ft.

      S 11kt
      3-4ft


Associated Zone Forecast which includes this point

Last Update: 2:22 pm EDT Mar 14, 2026
Forecast Valid: 4pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026

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Detailed Forecast

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

Tonight
WNW wind 13 to 16 kt becoming NNW 8 to 11 kt after midnight. Winds could gust as high as 26 kt. Increasing clouds. Seas 5 ft subsiding to 2 ft.
Sunday
ENE wind 10 to 15 kt becoming ESE in the afternoon. Partly sunny. Seas around 2 ft.
Sunday Night
ESE wind 13 to 16 kt increasing to 18 to 21 kt after midnight. Winds could gust as high as 30 kt. Showers, mainly after 2am. Seas 2 ft building to 4 ft.
Monday
S wind 24 to 28 kt, with gusts as high as 39 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 7 ft building to 11 ft.
Monday Night
S wind 32 to 35 kt becoming SW 28 to 31 kt after midnight. Winds could gust as high as 44 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 15 ft subsiding to 13 ft.
Tuesday
W wind 24 to 28 kt, with gusts as high as 34 kt. A chance of showers before 8am. Seas 10 ft subsiding to 8 ft.
Tuesday Night
WNW wind 23 to 26 kt decreasing to 18 to 21 kt after midnight. Partly cloudy. Seas 7 ft subsiding to 5 ft.
Wednesday
NW wind 6 to 11 kt becoming SW in the afternoon. Mostly sunny. Seas around 4 ft.
Wednesday Night
S wind 9 to 11 kt. Mostly cloudy. Seas 3 to 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: 2:22 pm EDT Mar 14, 2026
Forecast Valid: 4pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026
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