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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SSW wind 21 to 24 kt becoming WSW 18 to 21 kt after midnight. Winds could gust as high as 30 kt. Showers, mainly after 11pm.   Seas 5 to 6 ft.

      SSW 24kt⇓
      5-6ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday

      Friday:N wind 11 to 14 kt, with gusts as high as 20 kt. Showers, mainly before 11am.   Seas 4 to 5 ft.

      N 14kt
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday Night

      Friday Night:NE wind 8 to 11 kt becoming N after midnight. A slight chance of showers before 8pm.   Seas around 3 ft.

      N 11kt
      3ft

    • Saturday

      Saturday:NW wind 13 to 16 kt, with gusts as high as 22 kt. Mostly sunny. Seas around 3 ft.

      NW 16kt
      3ft

    • Saturday Night

      Saturday Night:NW wind 10 to 13 kt decreasing to 7 to 10 kt after midnight. Mostly clear. Seas 2 to 3 ft.

      NW 13kt⇓
      2-3ft

    • Sunday

      Sunday:SSW wind 11 to 16 kt increasing to 16 to 21 kt in the afternoon. Mostly sunny. Seas 2 to 3 ft.

      ⇑SSW 21kt
      2-3ft

    • Sunday Night

      Sunday Night:SW wind 18 to 22 kt. Mostly cloudy. Seas around 5 ft.

      SW 22kt
      5ft

    • Monday

      Monday:SSW wind 15 to 17 kt. Partly sunny. Seas 4 to 5 ft.

      SSW 17kt
      4-5ft

    • Monday Night

      Monday Night:WSW wind around 17 kt. Mostly cloudy. Seas 6 ft subsiding to 4 ft.

      WSW 17kt
      6ftWaves Subsiding


Associated Zone Forecast which includes this point

Last Update: 7:31 pm EDT Mar 26, 2026
Forecast Valid: 8pm EDT Mar 26, 2026-6pm EDT Apr 2, 2026

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Detailed Forecast

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

Tonight
SSW wind 21 to 24 kt becoming WSW 18 to 21 kt after midnight. Winds could gust as high as 30 kt. Showers, mainly after 11pm. Seas 5 to 6 ft.
Friday
N wind 11 to 14 kt, with gusts as high as 20 kt. Showers, mainly before 11am. Seas 4 to 5 ft.
Friday Night
NE wind 8 to 11 kt becoming N after midnight. A slight chance of showers before 8pm. Seas around 3 ft.
Saturday
NW wind 13 to 16 kt, with gusts as high as 22 kt. Mostly sunny. Seas around 3 ft.
Saturday Night
NW wind 10 to 13 kt decreasing to 7 to 10 kt after midnight. Mostly clear. Seas 2 to 3 ft.
Sunday
SSW wind 11 to 16 kt increasing to 16 to 21 kt in the afternoon. Mostly sunny. Seas 2 to 3 ft.
Sunday Night
SW wind 18 to 22 kt. Mostly cloudy. Seas around 5 ft.
Monday
SSW wind 15 to 17 kt. Partly sunny. Seas 4 to 5 ft.
Monday Night
WSW wind around 17 kt. Mostly cloudy. Seas 6 ft subsiding 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: 7:31 pm EDT Mar 26, 2026
Forecast Valid: 8pm EDT Mar 26, 2026-6pm EDT Apr 2, 2026
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