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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:SSW wind around 15 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe.   Seas around 4 ft.

      SSW 15kt
      4ft

    • Tonight

      Tonight:WSW wind 7 to 10 kt becoming N after midnight. Showers and possibly a thunderstorm before 11pm, then a chance of showers. Some of the storms could be severe.   Seas 3 to 4 ft.

      N 10kt
      3-4ft

    • Thursday

      Thursday:NNE wind around 12 kt becoming E in the afternoon. Showers likely, mainly before 11am.   Seas 2 to 3 ft.

      NE 12kt
      2-3ft

    • Thursday Night

      Thursday Night:SE wind around 6 kt becoming variable and less than 5 kt. Cloudy during the early evening, then gradual clearing. Seas around 2 ft.

      SE 6kt⇓
      2ft

    • Friday

      Friday:NE wind 13 to 16 kt becoming E in the afternoon. Increasing clouds. Seas 2 to 3 ft.

      E 16kt
      2-3ft

    • Friday Night

      Friday Night:E wind around 11 kt. A chance of showers after 2am.   Seas around 3 ft.

      E 11kt
      3ft

    • Saturday

      Saturday:E wind 16 to 19 kt increasing to 19 to 22 kt in the afternoon. Showers, mainly after 8am.   Seas 3 ft building to 5 ft.

      ⇑E 22kt
      Waves Building5ft

    • Saturday Night

      Saturday Night:E wind around 23 kt. Showers.   Seas around 6 ft.

      E 23kt
      6ft

    • Sunday

      Sunday:E wind 16 to 19 kt decreasing to 11 to 14 kt in the afternoon. Showers likely.   Seas around 6 ft.

      E 19kt⇓
      6ft


Associated Zone Forecast which includes this point

Last Update: 2:26 pm EDT May 20, 2026
Forecast Valid: 2pm EDT May 20, 2026-6pm EDT May 26, 2026

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Detailed Forecast

...SEVERE THUNDERSTORM WATCH 235 IN EFFECT UNTIL 9 PM EDT THIS

This Afternoon
SSW wind around 15 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Seas around 4 ft.
Tonight
WSW wind 7 to 10 kt becoming N after midnight. Showers and possibly a thunderstorm before 11pm, then a chance of showers. Some of the storms could be severe. Seas 3 to 4 ft.
Thursday
NNE wind around 12 kt becoming E in the afternoon. Showers likely, mainly before 11am. Seas 2 to 3 ft.
Thursday Night
SE wind around 6 kt becoming variable and less than 5 kt. Cloudy during the early evening, then gradual clearing. Seas around 2 ft.
Friday
NE wind 13 to 16 kt becoming E in the afternoon. Increasing clouds. Seas 2 to 3 ft.
Friday Night
E wind around 11 kt. A chance of showers after 2am. Seas around 3 ft.
Saturday
E wind 16 to 19 kt increasing to 19 to 22 kt in the afternoon. Showers, mainly after 8am. Seas 3 ft building to 5 ft.
Saturday Night
E wind around 23 kt. Showers. Seas around 6 ft.
Sunday
E wind 16 to 19 kt decreasing to 11 to 14 kt in the afternoon. Showers likely. Seas around 6 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: 2:26 pm EDT May 20, 2026
Forecast Valid: 2pm EDT May 20, 2026-6pm EDT May 26, 2026
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