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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • Late Afternoon

      Late Afternoon:SE wind around 15 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm.   Seas around 2 ft.

      SE 15kt
      2ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:S wind 15 to 20 kt becoming SSW 10 to 15 kt. Showers and possibly a thunderstorm.   Seas 3 ft building to 5 ft.

      S 20kt⇓
      Waves Building5ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:SSW wind 6 to 8 kt becoming NW in the afternoon. A chance of showers and thunderstorms, then showers likely after 11am.   Seas around 3 ft.

      W 8kt
      3ft

    • Tuesday Night

      Tuesday Night:NNW wind 7 to 10 kt. A chance of showers before 11pm.   Seas 2 to 3 ft.

      NNW 10kt
      2-3ft

    • Wednesday

      Wednesday:NNW wind 6 to 9 kt becoming WSW in the afternoon. Sunny. Seas 2 to 3 ft.

      WSW 9kt
      2-3ft

    • Wednesday Night

      Wednesday Night:SSW wind 7 to 12 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 2 to 3 ft.

      SSW 12kt⇓
      2-3ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming S 6 to 11 kt in the afternoon. Mostly sunny. Seas around 2 ft.

      ⇑S 11kt
      2ft

    • Thursday Night

      Thursday Night:S wind 12 to 15 kt. A chance of showers, with thunderstorms also possible after 2am.   Seas around 3 ft.

      S 15kt
      3ft

    • Friday

      Friday:S wind 10 to 13 kt. A chance of showers and thunderstorms.   Seas 2 to 3 ft.

      S 13kt
      2-3ft


Associated Zone Forecast which includes this point

Last Update: 2:30 pm EDT Jun 22, 2026
Forecast Valid: 5pm EDT Jun 22, 2026-6pm EDT Jun 29, 2026

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Detailed Forecast

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

Late Afternoon
SE wind around 15 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm. Seas around 2 ft.
Tonight
S wind 15 to 20 kt becoming SSW 10 to 15 kt. Showers and possibly a thunderstorm. Seas 3 ft building to 5 ft.
Tuesday
SSW wind 6 to 8 kt becoming NW in the afternoon. A chance of showers and thunderstorms, then showers likely after 11am. Seas around 3 ft.
Tuesday Night
NNW wind 7 to 10 kt. A chance of showers before 11pm. Seas 2 to 3 ft.
Wednesday
NNW wind 6 to 9 kt becoming WSW in the afternoon. Sunny. Seas 2 to 3 ft.
Wednesday Night
SSW wind 7 to 12 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 2 to 3 ft.
Thursday
Variable winds less than 5 kt becoming S 6 to 11 kt in the afternoon. Mostly sunny. Seas around 2 ft.
Thursday Night
S wind 12 to 15 kt. A chance of showers, with thunderstorms also possible after 2am. Seas around 3 ft.
Friday
S wind 10 to 13 kt. A chance of showers and thunderstorms. Seas 2 to 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: 2:30 pm EDT Jun 22, 2026
Forecast Valid: 5pm EDT Jun 22, 2026-6pm EDT Jun 29, 2026
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