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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Sunday

      Sunday:NNE wind 7 to 10 kt becoming SE in the afternoon. Sunny. Seas around 3 ft.

      ENE 10kt
      3ft

    • Sunday Night

      Sunday Night:S wind 11 to 14 kt. Increasing clouds. Seas 3 to 4 ft.

      S 14kt
      3-4ft

    • Monday

      Monday:SSW wind 16 to 19 kt. A slight chance of showers after 2pm.   Seas 4 to 5 ft.

      SSW 19kt
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday Night

      Monday Night:WSW wind 15 to 18 kt decreasing to 11 to 14 kt after midnight. Mostly cloudy. Seas 4 to 5 ft.

      WSW 18kt⇓
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:WSW wind 9 to 13 kt becoming SSW in the afternoon. Mostly sunny. Seas around 3 ft.

      SSW 13kt
      3ft

    • Tuesday Night

      Tuesday Night:SSW wind 11 to 16 kt. Mostly cloudy. Seas 3 to 4 ft.

      SSW 16kt
      3-4ft

    • Wednesday

      Wednesday:SSW wind 9 to 12 kt. Mostly sunny. Seas around 3 ft.

      SSW 12kt
      3ft

    • Wednesday Night

      Wednesday Night:SW wind 9 to 13 kt. A chance of showers.   Seas around 3 ft.

      SW 13kt
      3ft

    • Thursday

      Thursday:WSW wind 10 to 14 kt becoming S in the afternoon. Partly sunny. Seas around 3 ft.

      S 14kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 2:46 am EDT Apr 12, 2026
Forecast Valid: 3am EDT Apr 12, 2026-6pm EDT Apr 18, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH

Sunday
NNE wind 7 to 10 kt becoming SE in the afternoon. Sunny. Seas around 3 ft.
Sunday Night
S wind 11 to 14 kt. Increasing clouds. Seas 3 to 4 ft.
Monday
SSW wind 16 to 19 kt. A slight chance of showers after 2pm. Seas 4 to 5 ft.
Monday Night
WSW wind 15 to 18 kt decreasing to 11 to 14 kt after midnight. Mostly cloudy. Seas 4 to 5 ft.
Tuesday
WSW wind 9 to 13 kt becoming SSW in the afternoon. Mostly sunny. Seas around 3 ft.
Tuesday Night
SSW wind 11 to 16 kt. Mostly cloudy. Seas 3 to 4 ft.
Wednesday
SSW wind 9 to 12 kt. Mostly sunny. Seas around 3 ft.
Wednesday Night
SW wind 9 to 13 kt. A chance of showers. Seas around 3 ft.
Thursday
WSW wind 10 to 14 kt becoming S in the afternoon. Partly sunny. Seas around 3 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: 2:46 am EDT Apr 12, 2026
Forecast Valid: 3am EDT Apr 12, 2026-6pm EDT Apr 18, 2026
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