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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:ENE wind 8 to 10 kt becoming N after midnight. Mostly clear. Seas around 4 ft.

      ENE 10kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday

      Monday:NNE wind 8 to 10 kt becoming E in the afternoon. Sunny. Seas around 4 ft.

      NNE 10kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday Night

      Monday Night:E wind around 7 kt becoming NNE after midnight. Mostly clear. Seas around 4 ft.

      E 7kt
      4ft

    • Tuesday

      Tuesday:NNE wind around 9 kt becoming ESE in the afternoon. Mostly sunny. Seas around 4 ft.

      ESE 9kt
      4ft

    • Tuesday Night

      Tuesday Night:E wind 5 to 7 kt. Mostly cloudy. Seas around 4 ft.

      E 7kt
      4ft

    • Wednesday

      Wednesday:E wind 6 to 10 kt becoming ESE in the afternoon. A chance of showers after 2pm.   Seas 3 to 4 ft.

      ESE 10kt
      3-4ft

    • Wednesday Night

      Wednesday Night:SE wind around 10 kt. Showers, mainly after 8pm.   Seas around 3 ft.

      SE 10kt
      3ft

    • Thursday

      Thursday:SSE wind 9 to 13 kt becoming WNW in the afternoon. Showers.   Seas around 4 ft.

      WNW 13kt
      4ft

    • Thursday Night

      Thursday Night:NW wind 16 to 19 kt. Mostly cloudy. Seas 4 to 5 ft.

      NW 19kt
      4-5ft


Associated Zone Forecast which includes this point

Last Update: 7:44 pm EDT Apr 26, 2026
Forecast Valid: 10pm EDT Apr 26, 2026-6pm EDT May 3, 2026

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Detailed Forecast

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

Tonight
ENE wind 8 to 10 kt becoming N after midnight. Mostly clear. Seas around 4 ft.
Monday
NNE wind 8 to 10 kt becoming E in the afternoon. Sunny. Seas around 4 ft.
Monday Night
E wind around 7 kt becoming NNE after midnight. Mostly clear. Seas around 4 ft.
Tuesday
NNE wind around 9 kt becoming ESE in the afternoon. Mostly sunny. Seas around 4 ft.
Tuesday Night
E wind 5 to 7 kt. Mostly cloudy. Seas around 4 ft.
Wednesday
E wind 6 to 10 kt becoming ESE in the afternoon. A chance of showers after 2pm. Seas 3 to 4 ft.
Wednesday Night
SE wind around 10 kt. Showers, mainly after 8pm. Seas around 3 ft.
Thursday
SSE wind 9 to 13 kt becoming WNW in the afternoon. Showers. Seas around 4 ft.
Thursday Night
NW wind 16 to 19 kt. Mostly cloudy. Seas 4 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: 7:44 pm EDT Apr 26, 2026
Forecast Valid: 10pm EDT Apr 26, 2026-6pm EDT May 3, 2026
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