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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:ENE wind 10 to 15 kt increasing to 17 to 22 kt after midnight. Showers, mainly before 5am.   Seas around 4 ft.

      ⇑ENE 22kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:ENE wind 20 to 22 kt. A chance of showers, mainly before 11am.   Seas 4 to 5 ft.

      ENE 22kt
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday Night

      Thursday Night:E wind 17 to 20 kt decreasing to 13 to 16 kt after midnight. A chance of showers, mainly after 2am.   Seas 4 to 5 ft.

      E 20kt⇓
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday

      Friday:E wind 6 to 11 kt becoming SSW in the afternoon. A chance of showers before 8am.   Seas around 3 ft.

      SSW 11kt
      3ft

    • Friday Night

      Friday Night:SW wind 19 to 22 kt decreasing to 14 to 17 kt after midnight. Mostly cloudy. Seas 4 to 5 ft.

      SW 22kt⇓
      4-5ft

    • Saturday

      Saturday:SW wind 9 to 13 kt becoming SSE in the afternoon. Mostly sunny. Seas 3 to 4 ft.

      SSE 13kt
      3-4ft

    • Saturday Night

      Saturday Night:S wind 21 to 23 kt. A chance of showers after 2am.   Seas 4 to 5 ft.

      S 23kt
      4-5ft

    • Sunday

      Sunday:SSW wind 24 to 27 kt. Showers.   Seas 6 ft building to 8 ft.

      SSW 27kt
      Waves Building8ft

    • Sunday Night

      Sunday Night:WSW wind 17 to 20 kt becoming WNW after midnight. Showers.   Seas 5 to 6 ft.

      WSW 20kt
      5-6ft


Associated Zone Forecast which includes this point

Last Update: 9:10 pm EDT Apr 1, 2026
Forecast Valid: 9pm EDT Apr 1, 2026-6pm EDT Apr 8, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...

Tonight
ENE wind 10 to 15 kt increasing to 17 to 22 kt after midnight. Showers, mainly before 5am. Seas around 4 ft.
Thursday
ENE wind 20 to 22 kt. A chance of showers, mainly before 11am. Seas 4 to 5 ft.
Thursday Night
E wind 17 to 20 kt decreasing to 13 to 16 kt after midnight. A chance of showers, mainly after 2am. Seas 4 to 5 ft.
Friday
E wind 6 to 11 kt becoming SSW in the afternoon. A chance of showers before 8am. Seas around 3 ft.
Friday Night
SW wind 19 to 22 kt decreasing to 14 to 17 kt after midnight. Mostly cloudy. Seas 4 to 5 ft.
Saturday
SW wind 9 to 13 kt becoming SSE in the afternoon. Mostly sunny. Seas 3 to 4 ft.
Saturday Night
S wind 21 to 23 kt. A chance of showers after 2am. Seas 4 to 5 ft.
Sunday
SSW wind 24 to 27 kt. Showers. Seas 6 ft building to 8 ft.
Sunday Night
WSW wind 17 to 20 kt becoming WNW after midnight. Showers. Seas 5 to 6 ft.

Winds and seas may be higher in and near tstms.

*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: 9:10 pm EDT Apr 1, 2026
Forecast Valid: 9pm EDT Apr 1, 2026-6pm EDT Apr 8, 2026
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