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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Thursday

      Thursday:SE wind 5 to 7 kt becoming NW in the afternoon. Showers likely before 11am, then a slight chance of showers after 5pm.   Seas 3 to 4 ft.

      SE 7kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday Night

      Thursday Night:W wind 9 to 12 kt becoming NW after midnight. A slight chance of showers before 8pm.   Seas around 4 ft.

      NW 12kt
      4ft

    • Friday

      Friday:NW wind 11 to 13 kt becoming SW in the afternoon. Sunny. Seas 3 to 4 ft.

      NW 13kt
      3-4ft

    • Friday Night

      Friday Night:SSW wind 9 to 12 kt becoming W after midnight. A slight chance of showers.   Seas 3 to 4 ft.

      SSW 12kt
      3-4ft

    • Saturday

      Saturday:NNW wind 6 to 10 kt becoming S in the morning. A chance of rain, mainly after 2pm.   Seas 2 to 3 ft.

      S 10kt
      2-3ft

    • Saturday Night

      Saturday Night:S wind 9 to 11 kt becoming NNW after midnight. A chance of rain.   Seas 2 to 3 ft.

      NNW 11kt
      2-3ft

    • Sunday

      Sunday:NNW wind around 15 kt becoming W in the afternoon. Mostly sunny. Seas around 3 ft.

      NNW 15kt
      3ft

    • Sunday Night

      Sunday Night:WNW wind 7 to 12 kt becoming WSW after midnight. Mostly clear. Seas around 3 ft.

      WNW 12kt
      3ft

    • Monday

      Monday:SW wind 13 to 18 kt becoming S 21 to 26 kt in the afternoon. Mostly sunny. Seas 3 ft building to 5 ft.

      ⇑S 26kt
      Waves Building5ft


Associated Zone Forecast which includes this point

Last Update: 2:19 am EDT Apr 30, 2026
Forecast Valid: 4am EDT Apr 30, 2026-6pm EDT May 6, 2026

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Detailed Forecast

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

Thursday
SE wind 5 to 7 kt becoming NW in the afternoon. Showers likely before 11am, then a slight chance of showers after 5pm. Seas 3 to 4 ft.
Thursday Night
W wind 9 to 12 kt becoming NW after midnight. A slight chance of showers before 8pm. Seas around 4 ft.
Friday
NW wind 11 to 13 kt becoming SW in the afternoon. Sunny. Seas 3 to 4 ft.
Friday Night
SSW wind 9 to 12 kt becoming W after midnight. A slight chance of showers. Seas 3 to 4 ft.
Saturday
NNW wind 6 to 10 kt becoming S in the morning. A chance of rain, mainly after 2pm. Seas 2 to 3 ft.
Saturday Night
S wind 9 to 11 kt becoming NNW after midnight. A chance of rain. Seas 2 to 3 ft.
Sunday
NNW wind around 15 kt becoming W in the afternoon. Mostly sunny. Seas around 3 ft.
Sunday Night
WNW wind 7 to 12 kt becoming WSW after midnight. Mostly clear. Seas around 3 ft.
Monday
SW wind 13 to 18 kt becoming S 21 to 26 kt in the afternoon. Mostly sunny. Seas 3 ft building to 5 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: 2:19 am EDT Apr 30, 2026
Forecast Valid: 4am EDT Apr 30, 2026-6pm EDT May 6, 2026
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