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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Today

      Today:WNW wind 15 to 19 kt becoming WSW in the afternoon. Sunny. Seas 3 to 4 ft.

      WNW 19kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:WNW wind 10 to 13 kt decreasing to 5 to 8 kt after midnight. Mostly clear. Seas 2 to 3 ft.

      WNW 13kt⇓
      2-3ft

    • Sunday

      Sunday:WNW wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Sunny. Seas around 2 ft.

      ⇑SSW 12kt
      2ft

    • Sunday Night

      Sunday Night:SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A slight chance of showers after 2am.   Seas around 2 ft.

      SSW 9kt⇓
      2ft

    • Monday

      Monday:ESE wind 7 to 10 kt becoming SSE 18 to 23 kt. Showers likely, then showers and possibly a thunderstorm after 2pm.   Seas 2 ft building to 4 ft.

      ⇑SSE 23kt
      Waves Building4ft

    • Monday Night

      Monday Night:S wind 18 to 23 kt becoming WSW 12 to 17 kt after midnight. Winds could gust as high as 29 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers.   Seas 6 ft subsiding to 4 ft.

      S 23kt⇓
      6ftWaves Subsiding

    • Tuesday

      Tuesday:NW wind 9 to 11 kt. A chance of showers before 8am.   Seas around 4 ft.

      NW 11kt
      4ft

    • Tuesday Night

      Tuesday Night:W wind around 8 kt becoming NNW after midnight. Partly cloudy. Seas around 3 ft.

      W 8kt
      3ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas around 3 ft.

      ⇑SSW 9kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 2:19 am EDT Jun 20, 2026
Forecast Valid: 5am EDT Jun 20, 2026-6pm EDT Jun 26, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

Today
WNW wind 15 to 19 kt becoming WSW in the afternoon. Sunny. Seas 3 to 4 ft.
Tonight
WNW wind 10 to 13 kt decreasing to 5 to 8 kt after midnight. Mostly clear. Seas 2 to 3 ft.
Sunday
WNW wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Sunny. Seas around 2 ft.
Sunday Night
SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A slight chance of showers after 2am. Seas around 2 ft.
Monday
ESE wind 7 to 10 kt becoming SSE 18 to 23 kt. Showers likely, then showers and possibly a thunderstorm after 2pm. Seas 2 ft building to 4 ft.
Monday Night
S wind 18 to 23 kt becoming WSW 12 to 17 kt after midnight. Winds could gust as high as 29 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 6 ft subsiding to 4 ft.
Tuesday
NW wind 9 to 11 kt. A chance of showers before 8am. Seas around 4 ft.
Tuesday Night
W wind around 8 kt becoming NNW after midnight. Partly cloudy. Seas around 3 ft.
Wednesday
Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas around 3 ft.

Winds and seas may be higher in and near tstms.

*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 am EDT Jun 20, 2026
Forecast Valid: 5am EDT Jun 20, 2026-6pm EDT Jun 26, 2026
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