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Hazardous Weather Conditions

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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:E wind 18 to 21 kt decreasing to 12 to 15 kt after midnight. Winds could gust as high as 27 kt. A chance of rain or drizzle, mainly between midnight and 2am. Patchy fog. Seas 6 to 7 ft.

      E 21kt⇓
      6-7ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday

      Friday:E wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Areas of fog before noon. Seas 4 to 5 ft.

      ⇑SSW 12kt
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday Night

      Friday Night:SSW wind 17 to 20 kt decreasing to 13 to 16 kt after midnight. Mostly cloudy. Seas 4 to 5 ft.

      SSW 20kt⇓
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Saturday

      Saturday:SSW wind 6 to 9 kt becoming E 10 to 13 kt in the afternoon. A chance of showers and thunderstorms, mainly after 2pm. Seas 3 to 4 ft.

      ⇑E 13kt
      3-4ft

    • Saturday Night

      Saturday Night:E wind 15 to 18 kt becoming SE after midnight. A chance of showers. Seas around 4 ft.

      E 18kt
      4ft

    • Sunday

      Sunday:SSW wind 21 to 26 kt, with gusts as high as 32 kt. Showers. Seas 6 ft building to 8 ft.

      SSW 26kt
      Waves Building8ft

    • Sunday Night

      Sunday Night:WSW wind around 17 kt becoming WNW after midnight. A chance of showers before 8pm. Seas 5 to 6 ft.

      W 17kt
      5-6ft

    • Monday

      Monday:WNW wind 13 to 16 kt becoming W in the afternoon. Sunny. Seas 3 to 4 ft.

      WNW 16kt
      3-4ft

    • Monday Night

      Monday Night:WNW wind 8 to 11 kt. Partly cloudy. Seas 2 to 3 ft.

      WNW 11kt
      2-3ft


Associated Zone Forecast which includes this point

Last Update: 2:27 pm EDT Apr 2, 2026
Forecast Valid: 8pm EDT Apr 2, 2026-6pm EDT Apr 9, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT...

Tonight
E wind 18 to 21 kt decreasing to 12 to 15 kt after midnight. Winds could gust as high as 27 kt. A chance of rain or drizzle, mainly between midnight and 2am. Patchy fog. Seas 6 to 7 ft.
Friday
E wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Areas of fog before noon. Seas 4 to 5 ft.
Friday Night
SSW wind 17 to 20 kt decreasing to 13 to 16 kt after midnight. Mostly cloudy. Seas 4 to 5 ft.
Saturday
SSW wind 6 to 9 kt becoming E 10 to 13 kt in the afternoon. A chance of showers and thunderstorms, mainly after 2pm. Seas 3 to 4 ft.
Saturday Night
E wind 15 to 18 kt becoming SE after midnight. A chance of showers. Seas around 4 ft.
Sunday
SSW wind 21 to 26 kt, with gusts as high as 32 kt. Showers. Seas 6 ft building to 8 ft.
Sunday Night
WSW wind around 17 kt becoming WNW after midnight. A chance of showers before 8pm. Seas 5 to 6 ft.
Monday
WNW wind 13 to 16 kt becoming W in the afternoon. Sunny. Seas 3 to 4 ft.
Monday Night
WNW wind 8 to 11 kt. Partly cloudy. Seas 2 to 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: 2:27 pm EDT Apr 2, 2026
Forecast Valid: 8pm EDT Apr 2, 2026-6pm EDT Apr 9, 2026
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