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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:S wind around 25 kt, with gusts as high as 31 kt. Showers, mainly before 5pm.   Seas around 7 ft.

      S 25kt
      7ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:SSW wind 16 to 21 kt becoming WNW 10 to 15 kt after midnight. Showers likely and possibly a thunderstorm.   Seas 6 ft subsiding to 4 ft.

      SSW 21kt⇓
      6ftWaves Subsiding

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:NNW wind 6 to 10 kt becoming SSW in the afternoon. A chance of showers before 8am.   Seas 3 to 4 ft.

      NNW 10kt
      3-4ft

    • Thursday Night

      Thursday Night:SW wind 6 to 9 kt becoming NNW after midnight. Partly cloudy. Seas 2 to 3 ft.

      SW 9kt
      2-3ft

    • Friday

      Friday:WNW wind 8 to 11 kt becoming SW 12 to 15 kt in the afternoon. Sunny. Seas 2 to 3 ft.

      ⇑SW 15kt
      2-3ft

    • Friday Night

      Friday Night:SSW wind 9 to 11 kt. Partly cloudy. Seas around 3 ft.

      SSW 11kt
      3ft

    • Saturday

      Saturday:S wind 13 to 18 kt, with gusts as high as 24 kt. Showers.   Seas 3 to 4 ft.

      S 18kt
      3-4ft

    • Saturday Night

      Saturday Night:SW wind 10 to 13 kt decreasing to 7 to 10 kt after midnight. A chance of showers.   Seas around 4 ft.

      SW 13kt⇓
      4ft

    • Sunday

      Sunday:SW wind 5 to 8 kt becoming S 10 to 13 kt in the afternoon. Partly sunny. Seas 3 to 4 ft.

      ⇑S 13kt
      3-4ft


Associated Zone Forecast which includes this point

Last Update: 2:39 pm EDT May 6, 2026
Forecast Valid: 3pm EDT May 6, 2026-6pm EDT May 13, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

This Afternoon
S wind around 25 kt, with gusts as high as 31 kt. Showers, mainly before 5pm. Seas around 7 ft.
Tonight
SSW wind 16 to 21 kt becoming WNW 10 to 15 kt after midnight. Showers likely and possibly a thunderstorm. Seas 6 ft subsiding to 4 ft.
Thursday
NNW wind 6 to 10 kt becoming SSW in the afternoon. A chance of showers before 8am. Seas 3 to 4 ft.
Thursday Night
SW wind 6 to 9 kt becoming NNW after midnight. Partly cloudy. Seas 2 to 3 ft.
Friday
WNW wind 8 to 11 kt becoming SW 12 to 15 kt in the afternoon. Sunny. Seas 2 to 3 ft.
Friday Night
SSW wind 9 to 11 kt. Partly cloudy. Seas around 3 ft.
Saturday
S wind 13 to 18 kt, with gusts as high as 24 kt. Showers. Seas 3 to 4 ft.
Saturday Night
SW wind 10 to 13 kt decreasing to 7 to 10 kt after midnight. A chance of showers. Seas around 4 ft.
Sunday
SW wind 5 to 8 kt becoming S 10 to 13 kt in the afternoon. Partly 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: 2:39 pm EDT May 6, 2026
Forecast Valid: 3pm EDT May 6, 2026-6pm EDT May 13, 2026
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