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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:N wind 18 to 21 kt. Partly cloudy. Seas around 4 ft.

      N 21kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday

      Friday:N wind 14 to 17 kt becoming NNE 8 to 11 kt in the afternoon. A chance of snow after 4pm. Seas 2 to 3 ft.

      N 17kt⇓
      2-3ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday Night

      Friday Night:ESE wind 9 to 14 kt increasing to 14 to 19 kt after midnight. Snow before 1am, then rain and snow. The snow could be heavy at times. Seas 2 ft building to 4 ft.

      ⇑ESE 19kt
      Waves Building4ft

    • Saturday

      Saturday:ENE wind 18 to 21 kt becoming NNE 15 to 18 kt in the afternoon. Rain and snow before 10am, then snow likely between 10am and 4pm, then a chance of rain after 4pm. Seas around 4 ft.

      ENE 21kt⇓
      4ft

    • Saturday Night

      Saturday Night:N wind 8 to 11 kt. A chance of rain before 7pm. Seas 3 to 4 ft.

      N 11kt
      3-4ft

    • Sunday

      Sunday:NNW wind 7 to 9 kt becoming WSW in the afternoon. Mostly cloudy. Seas around 2 ft.

      W 9kt
      2ft

    • Sunday Night

      Sunday Night:SSW wind 10 to 13 kt increasing to 16 to 19 kt after midnight. Rain, mainly after 7pm. Seas 2 ft building to 4 ft.

      ⇑SSW 19kt
      Waves Building4ft

    • Monday

      Monday:SW wind 19 to 22 kt becoming W 23 to 26 kt in the afternoon. Winds could gust as high as 32 kt. Rain. Seas 4 ft building to 6 ft.

      ⇑W 26kt
      Waves Building6ft

    • Monday Night

      Monday Night:W wind 32 to 37 kt. Mostly cloudy. Seas 7 to 8 ft.

      W 37kt
      7-8ft


Associated Zone Forecast which includes this point

Last Update: 1:14 pm EST Dec 25, 2025
Forecast Valid: 10pm EST Dec 25, 2025-6pm EST Jan 1, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING...

Tonight
N wind 18 to 21 kt. Partly cloudy. Seas around 4 ft.
Friday
N wind 14 to 17 kt becoming NNE 8 to 11 kt in the afternoon. A chance of snow after 4pm. Seas 2 to 3 ft.
Friday Night
ESE wind 9 to 14 kt increasing to 14 to 19 kt after midnight. Snow before 1am, then rain and snow. The snow could be heavy at times. Seas 2 ft building to 4 ft.
Saturday
ENE wind 18 to 21 kt becoming NNE 15 to 18 kt in the afternoon. Rain and snow before 10am, then snow likely between 10am and 4pm, then a chance of rain after 4pm. Seas around 4 ft.
Saturday Night
N wind 8 to 11 kt. A chance of rain before 7pm. Seas 3 to 4 ft.
Sunday
NNW wind 7 to 9 kt becoming WSW in the afternoon. Mostly cloudy. Seas around 2 ft.
Sunday Night
SSW wind 10 to 13 kt increasing to 16 to 19 kt after midnight. Rain, mainly after 7pm. Seas 2 ft building to 4 ft.
Monday
SW wind 19 to 22 kt becoming W 23 to 26 kt in the afternoon. Winds could gust as high as 32 kt. Rain. Seas 4 ft building to 6 ft.
Monday Night
W wind 32 to 37 kt. Mostly cloudy. Seas 7 to 8 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: 1:14 pm EST Dec 25, 2025
Forecast Valid: 10pm EST Dec 25, 2025-6pm EST Jan 1, 2026
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