National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:W wind 12 to 15 kt decreasing to 9 to 12 kt in the afternoon. Sunny. Seas 2 to 3 ft.

      W 15kt⇓
      2-3ft

    • Tonight

      Tonight:WNW wind 11 to 13 kt becoming NNW after midnight. Mostly clear. Seas around 3 ft.

      WNW 13kt
      3ft

    • Tuesday

      Tuesday:NW wind 6 to 9 kt becoming SSW 10 to 13 kt in the afternoon. Sunny. Seas around 2 ft.

      ⇑SSW 13kt
      2ft

    • Tuesday Night

      Tuesday Night:S wind 11 to 14 kt decreasing to 7 to 10 kt after midnight. Partly cloudy. Seas 2 to 3 ft.

      S 14kt⇓
      2-3ft

    • Wednesday

      Wednesday:SSE wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. A slight chance of showers after 2pm. Seas around 2 ft.

      ⇑SSE 12kt
      2ft

    • Wednesday Night

      Wednesday Night:SSE wind around 10 kt. Mostly cloudy. Seas around 3 ft.

      SSE 10kt
      3ft

    • Thursday

      Thursday:S wind 15 to 18 kt increasing to 21 to 24 kt in the afternoon. Winds could gust as high as 30 kt. A chance of showers after 2pm. Seas 3 ft building to 6 ft.

      ⇑S 24kt
      Waves Building6ft

    • Thursday Night

      Thursday Night:SSW wind 19 to 24 kt becoming WSW 14 to 19 kt after midnight. Winds could gust as high as 31 kt. A chance of showers. Seas 7 ft subsiding to 5 ft.

      SSW 24kt⇓
      7ftWaves Subsiding

    • Juneteenth

      Juneteenth:W wind 12 to 16 kt. A chance of showers. Seas around 4 ft.

      W 16kt
      4ft


Associated Zone Forecast which includes this point

Last Update: 5:30 am EDT Jun 15, 2026
Forecast Valid: 7am EDT Jun 15, 2026-6pm EDT Jun 21, 2026

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Detailed Forecast


Today
W wind 12 to 15 kt decreasing to 9 to 12 kt in the afternoon. Sunny. Seas 2 to 3 ft.
Tonight
WNW wind 11 to 13 kt becoming NNW after midnight. Mostly clear. Seas around 3 ft.
Tuesday
NW wind 6 to 9 kt becoming SSW 10 to 13 kt in the afternoon. Sunny. Seas around 2 ft.
Tuesday Night
S wind 11 to 14 kt decreasing to 7 to 10 kt after midnight. Partly cloudy. Seas 2 to 3 ft.
Wednesday
SSE wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. A slight chance of showers after 2pm. Seas around 2 ft.
Wednesday Night
SSE wind around 10 kt. Mostly cloudy. Seas around 3 ft.
Thursday
S wind 15 to 18 kt increasing to 21 to 24 kt in the afternoon. Winds could gust as high as 30 kt. A chance of showers after 2pm. Seas 3 ft building to 6 ft.
Thursday Night
SSW wind 19 to 24 kt becoming WSW 14 to 19 kt after midnight. Winds could gust as high as 31 kt. A chance of showers. Seas 7 ft subsiding to 5 ft.
Juneteenth
W wind 12 to 16 kt. A chance of showers. Seas around 4 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: 5:30 am EDT Jun 15, 2026
Forecast Valid: 7am EDT Jun 15, 2026-6pm EDT Jun 21, 2026
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