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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Juneteenth

      Juneteenth:SW wind around 13 kt, with gusts as high as 20 kt. Partly sunny. Seas around 4 ft.

      SW 13kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:WNW wind 13 to 16 kt, with gusts as high as 22 kt. Mostly cloudy, then gradually becoming clear. Seas 3 to 4 ft.

      WNW 16kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Saturday

      Saturday:W wind 15 to 19 kt, with gusts as high as 25 kt. Sunny. Seas around 3 ft.

      W 19kt
      3ft

    • Saturday Night

      Saturday Night:WNW wind 8 to 13 kt. Mostly clear. Seas 2 to 3 ft.

      WNW 13kt
      2-3ft

    • Sunday

      Sunday:WNW wind 7 to 10 kt becoming SW 10 to 13 kt in the afternoon. Sunny. Seas around 2 ft.

      ⇑SW 13kt
      2ft

    • Sunday Night

      Sunday Night:SSW wind 6 to 11 kt. A chance of showers after 2am.   Seas 2 to 3 ft.

      SSW 11kt
      2-3ft

    • Monday

      Monday:SE wind 10 to 15 kt becoming S 21 to 26 kt. A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then rain and possibly a thunderstorm after 2pm.   Seas 2 ft building to 6 ft.

      ⇑S 26kt
      Waves Building6ft

    • Monday Night

      Monday Night:SSW wind 22 to 25 kt becoming WSW 17 to 20 kt after midnight. Winds could gust as high as 32 kt. Rain before 8pm, then showers likely, mainly between 8pm and 2am.   Seas 8 ft subsiding to 6 ft.

      SSW 25kt⇓
      8ftWaves Subsiding

    • Tuesday

      Tuesday:WNW wind 11 to 13 kt becoming W in the afternoon. A chance of showers.   Seas 3 to 4 ft.

      WNW 13kt
      3-4ft


Associated Zone Forecast which includes this point

Last Update: 9:36 am EDT Jun 19, 2026
Forecast Valid: 11am EDT Jun 19, 2026-6pm EDT Jun 25, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

Juneteenth
SW wind around 13 kt, with gusts as high as 20 kt. Partly sunny. Seas around 4 ft.
Tonight
WNW wind 13 to 16 kt, with gusts as high as 22 kt. Mostly cloudy, then gradually becoming clear. Seas 3 to 4 ft.
Saturday
W wind 15 to 19 kt, with gusts as high as 25 kt. Sunny. Seas around 3 ft.
Saturday Night
WNW wind 8 to 13 kt. Mostly clear. Seas 2 to 3 ft.
Sunday
WNW wind 7 to 10 kt becoming SW 10 to 13 kt in the afternoon. Sunny. Seas around 2 ft.
Sunday Night
SSW wind 6 to 11 kt. A chance of showers after 2am. Seas 2 to 3 ft.
Monday
SE wind 10 to 15 kt becoming S 21 to 26 kt. A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then rain and possibly a thunderstorm after 2pm. Seas 2 ft building to 6 ft.
Monday Night
SSW wind 22 to 25 kt becoming WSW 17 to 20 kt after midnight. Winds could gust as high as 32 kt. Rain before 8pm, then showers likely, mainly between 8pm and 2am. Seas 8 ft subsiding to 6 ft.
Tuesday
WNW wind 11 to 13 kt becoming W in the afternoon. A chance of showers. Seas 3 to 4 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: 9:36 am EDT Jun 19, 2026
Forecast Valid: 11am EDT Jun 19, 2026-6pm EDT Jun 25, 2026
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