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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Thursday

      Thursday:ENE wind 20 to 23 kt. A chance of showers, mainly before 11am.   Seas 4 to 5 ft.

      ENE 23kt
      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. A slight chance of showers after 2pm.   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, mainly after 2pm.   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

    • Monday

      Monday:W wind 12 to 16 kt. Mostly sunny. Seas 3 to 4 ft.

      W 16kt
      3-4ft


Associated Zone Forecast which includes this point

Last Update: 9:10 pm EDT Apr 1, 2026
Forecast Valid: 1am EDT Apr 2, 2026-6pm EDT Apr 8, 2026

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Detailed Forecast

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

Thursday
ENE wind 20 to 23 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. A slight chance of showers after 2pm. 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, mainly after 2pm. 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.
Monday
W wind 12 to 16 kt. Mostly sunny. Seas 3 to 4 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: 1am EDT Apr 2, 2026-6pm EDT Apr 8, 2026
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