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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]

    • Christmas Day

      Christmas Day:W wind around 19 kt becoming NW. Partly sunny. Seas 3 to 4 ft.

      W 19kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:N wind 19 to 21 kt. Partly cloudy. Seas around 4 ft.

      N 21kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday

      Friday:N wind 13 to 18 kt becoming NNE 8 to 11 kt in the afternoon. A chance of snow after 1pm. Seas 2 to 3 ft.

      N 18kt⇓
      2-3ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday Night

      Friday Night:E wind 7 to 12 kt increasing to 13 to 18 kt after midnight. Snow before 1am, then snow, possibly mixed with rain. The snow could be heavy at times. Seas 2 ft building to 4 ft.

      ⇑E 18kt
      Waves Building4ft

    • Saturday

      Saturday:ENE wind 16 to 19 kt becoming NNE 13 to 16 kt in the afternoon. A chance of rain and snow before 1pm, then a chance of snow. Seas around 4 ft.

      ENE 19kt⇓
      4ft

    • Saturday Night

      Saturday Night:N wind 9 to 12 kt. Mostly cloudy. Seas 3 to 4 ft.

      N 12kt
      3-4ft

    • Sunday

      Sunday:NNW wind 6 to 11 kt becoming WSW in the afternoon. A chance of rain after 1pm. Seas around 3 ft.

      WSW 11kt
      3ft

    • Sunday Night

      Sunday Night:SSW wind 12 to 15 kt increasing to 15 to 18 kt after midnight. Rain. Seas 3 to 4 ft.

      ⇑SSW 18kt
      3-4ft

    • Monday

      Monday:SSW wind 21 to 24 kt becoming W 26 to 29 kt in the afternoon. Winds could gust as high as 35 kt. Rain. Seas 5 ft building to 8 ft.

      ⇑W 29kt
      Waves Building8ft


Associated Zone Forecast which includes this point

Last Update: 1:36 am EST Dec 25, 2025
Forecast Valid: 12pm EST Dec 25, 2025-6pm EST Dec 31, 2025

View Nearby Observations

Detailed Forecast

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

Christmas Day
W wind around 19 kt becoming NW. Partly sunny. Seas 3 to 4 ft.
Tonight
N wind 19 to 21 kt. Partly cloudy. Seas around 4 ft.
Friday
N wind 13 to 18 kt becoming NNE 8 to 11 kt in the afternoon. A chance of snow after 1pm. Seas 2 to 3 ft.
Friday Night
E wind 7 to 12 kt increasing to 13 to 18 kt after midnight. Snow before 1am, then snow, possibly mixed with rain. The snow could be heavy at times. Seas 2 ft building to 4 ft.
Saturday
ENE wind 16 to 19 kt becoming NNE 13 to 16 kt in the afternoon. A chance of rain and snow before 1pm, then a chance of snow. Seas around 4 ft.
Saturday Night
N wind 9 to 12 kt. Mostly cloudy. Seas 3 to 4 ft.
Sunday
NNW wind 6 to 11 kt becoming WSW in the afternoon. A chance of rain after 1pm. Seas around 3 ft.
Sunday Night
SSW wind 12 to 15 kt increasing to 15 to 18 kt after midnight. Rain. Seas 3 to 4 ft.
Monday
SSW wind 21 to 24 kt becoming W 26 to 29 kt in the afternoon. Winds could gust as high as 35 kt. Rain. Seas 5 ft building 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: 1:36 am EST Dec 25, 2025
Forecast Valid: 12pm EST Dec 25, 2025-6pm EST Dec 31, 2025
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