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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:SE wind 9 to 11 kt. A chance of showers after 5am. Patchy fog after 8pm. Seas around 2 ft.

      SE 11kt
      2ft

    • Sunday

      Sunday:S wind 10 to 13 kt becoming NW 15 to 18 kt in the morning. Winds could gust as high as 25 kt. Showers, mainly before 5pm. Patchy fog before 8am. Seas 2 to 3 ft.

      ⇑NW 18kt
      2-3ft

      Small Craft Advisory
      Small Craft Advisory

    • Sunday Night

      Sunday Night:WNW wind 8 to 11 kt. A slight chance of showers before 8pm. Seas 2 to 3 ft.

      WNW 11kt
      2-3ft

    • Monday

      Monday:NW wind around 13 kt. A chance of showers, mainly after 2pm. Seas around 2 ft.

      NW 13kt
      2ft

    • Monday Night

      Monday Night:NNW wind 14 to 16 kt. A chance of showers before 8pm. Seas around 2 ft.

      NNW 16kt
      2ft

    • Tuesday

      Tuesday:N wind 6 to 11 kt becoming SSW in the afternoon. Sunny. Seas 1 to 2 ft.

      N 11kt
      1-2ft

    • Tuesday Night

      Tuesday Night:SSW wind 17 to 19 kt. Increasing clouds. Seas 2 ft building to 4 ft.

      SSW 19kt
      Waves Building4ft

    • Wednesday

      Wednesday:SW wind 12 to 17 kt. A chance of showers. Seas around 3 ft.

      SW 17kt
      3ft

    • Wednesday Night

      Wednesday Night:W wind around 11 kt becoming N in the evening. Partly cloudy. Seas around 3 ft.

      W 11kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 2:19 pm EDT Apr 18, 2026
Forecast Valid: 5pm EDT Apr 18, 2026-6pm EDT Apr 25, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH

Tonight
SE wind 9 to 11 kt. A chance of showers after 5am. Patchy fog after 8pm. Seas around 2 ft.
Sunday
S wind 10 to 13 kt becoming NW 15 to 18 kt in the morning. Winds could gust as high as 25 kt. Showers, mainly before 5pm. Patchy fog before 8am. Seas 2 to 3 ft.
Sunday Night
WNW wind 8 to 11 kt. A slight chance of showers before 8pm. Seas 2 to 3 ft.
Monday
NW wind around 13 kt. A chance of showers, mainly after 2pm. Seas around 2 ft.
Monday Night
NNW wind 14 to 16 kt. A chance of showers before 8pm. Seas around 2 ft.
Tuesday
N wind 6 to 11 kt becoming SSW in the afternoon. Sunny. Seas 1 to 2 ft.
Tuesday Night
SSW wind 17 to 19 kt. Increasing clouds. Seas 2 ft building to 4 ft.
Wednesday
SW wind 12 to 17 kt. A chance of showers. Seas around 3 ft.
Wednesday Night
W wind around 11 kt becoming N in the evening. Partly cloudy. 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: 2:19 pm EDT Apr 18, 2026
Forecast Valid: 5pm EDT Apr 18, 2026-6pm EDT Apr 25, 2026
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