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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:W wind 10 to 15 kt becoming variable and less than 5 kt after midnight. Winds could gust as high as 21 kt. Mostly clear. Seas 2 to 3 ft.

      W 15kt⇓
      2-3ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Sunny. Seas around 2 ft.

      ⇑S 11kt
      2ft

    • Sunday Night

      Sunday Night:SW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas around 2 ft.

      SW 7kt⇓
      2ft

    • Monday

      Monday:Variable winds less than 5 kt becoming SE 12 to 17 kt in the morning. A chance of showers, then showers and possibly a thunderstorm after 2pm. Seas 2 to 3 ft.

      ⇑SE 17kt
      2-3ft

    • Monday Night

      Monday Night:SSW wind 16 to 21 kt. Showers and possibly a thunderstorm. Seas 4 to 5 ft.

      SSW 21kt
      4-5ft

    • Tuesday

      Tuesday:WSW wind around 10 kt becoming NNW in the afternoon. A chance of showers. Seas 3 to 4 ft.

      WSW 10kt
      3-4ft

    • Tuesday Night

      Tuesday Night:NW wind around 8 kt. Partly cloudy. Seas around 3 ft.

      NW 8kt
      3ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Sunny. Seas around 2 ft.

      ⇑SSW 8kt
      2ft

    • Wednesday Night

      Wednesday Night:SSW wind 5 to 10 kt. Mostly clear. Seas around 3 ft.

      SSW 10kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 2:28 pm EDT Jun 20, 2026
Forecast Valid: 6pm EDT Jun 20, 2026-6pm EDT Jun 27, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

Tonight
W wind 10 to 15 kt becoming variable and less than 5 kt after midnight. Winds could gust as high as 21 kt. Mostly clear. Seas 2 to 3 ft.
Sunday
Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Sunny. Seas around 2 ft.
Sunday Night
SW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas around 2 ft.
Monday
Variable winds less than 5 kt becoming SE 12 to 17 kt in the morning. A chance of showers, then showers and possibly a thunderstorm after 2pm. Seas 2 to 3 ft.
Monday Night
SSW wind 16 to 21 kt. Showers and possibly a thunderstorm. Seas 4 to 5 ft.
Tuesday
WSW wind around 10 kt becoming NNW in the afternoon. A chance of showers. Seas 3 to 4 ft.
Tuesday Night
NW wind around 8 kt. Partly cloudy. Seas around 3 ft.
Wednesday
Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Sunny. Seas around 2 ft.
Wednesday Night
SSW wind 5 to 10 kt. Mostly clear. 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: 2:28 pm EDT Jun 20, 2026
Forecast Valid: 6pm EDT Jun 20, 2026-6pm EDT Jun 27, 2026
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