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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SW wind 22 to 26 kt. A slight chance of rain before 1am.   Seas around 6 ft.

      SW 26kt
      6ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:WSW wind 20 to 22 kt. Mostly sunny. Seas 5 to 6 ft.

      WSW 22kt
      5-6ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday Night

      Thursday Night:W wind 17 to 20 kt. Partly cloudy. Seas 4 to 5 ft.

      W 20kt
      4-5ft

    • Friday

      Friday:W wind 15 to 18 kt increasing to 20 to 23 kt in the afternoon. Partly sunny. Seas 3 to 4 ft.

      ⇑W 23kt
      3-4ft

    • Friday Night

      Friday Night:WNW wind 22 to 25 kt becoming NNW after midnight. Mostly cloudy. Seas 4 to 5 ft.

      WNW 25kt
      4-5ft

    • Saturday

      Saturday:NNW wind 16 to 19 kt decreasing to 13 to 16 kt in the afternoon. Mostly cloudy. Seas 3 to 4 ft.

      NNW 19kt⇓
      3-4ft

    • Saturday Night

      Saturday Night:N wind 12 to 17 kt becoming NNE after midnight. Snow likely after 1am.   Seas around 2 ft.

      NNE 17kt
      2ft

    • Sunday

      Sunday:NE wind 20 to 23 kt increasing to 23 to 26 kt in the afternoon. Winds could gust as high as 33 kt. Snow.   Seas 3 to 4 ft.

      ⇑NE 26kt
      3-4ft

    • Sunday Night

      Sunday Night:NE wind 23 to 26 kt decreasing to 20 to 23 kt after midnight. Winds could gust as high as 34 kt. Snow.   Seas 4 to 5 ft.

      NE 26kt⇓
      4-5ft


Associated Zone Forecast which includes this point

Last Update: 6:01 pm EST Jan 21, 2026
Forecast Valid: 7pm EST Jan 21, 2026-6pm EST Jan 28, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING...

Tonight
SW wind 22 to 26 kt. A slight chance of rain before 1am. Seas around 6 ft.
Thursday
WSW wind 20 to 22 kt. Mostly sunny. Seas 5 to 6 ft.
Thursday Night
W wind 17 to 20 kt. Partly cloudy. Seas 4 to 5 ft.
Friday
W wind 15 to 18 kt increasing to 20 to 23 kt in the afternoon. Partly sunny. Seas 3 to 4 ft.
Friday Night
WNW wind 22 to 25 kt becoming NNW after midnight. Mostly cloudy. Seas 4 to 5 ft.
Saturday
NNW wind 16 to 19 kt decreasing to 13 to 16 kt in the afternoon. Mostly cloudy. Seas 3 to 4 ft.
Saturday Night
N wind 12 to 17 kt becoming NNE after midnight. Snow likely after 1am. Seas around 2 ft.
Sunday
NE wind 20 to 23 kt increasing to 23 to 26 kt in the afternoon. Winds could gust as high as 33 kt. Snow. Seas 3 to 4 ft.
Sunday Night
NE wind 23 to 26 kt decreasing to 20 to 23 kt after midnight. Winds could gust as high as 34 kt. Snow. Seas 4 to 5 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: 6:01 pm EST Jan 21, 2026
Forecast Valid: 7pm EST Jan 21, 2026-6pm EST Jan 28, 2026
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