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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:SSW wind around 18 kt. A slight chance of showers and thunderstorms after 5pm.   Seas around 4 ft.

      SSW 18kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:SSW wind 19 to 22 kt decreasing to 15 to 18 kt after midnight. A slight chance of showers and thunderstorms before 11pm.   Seas 4 to 5 ft.

      SSW 22kt⇓
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:SW wind 10 to 15 kt. Sunny. Seas around 3 ft.

      SW 15kt
      3ft

    • Thursday Night

      Thursday Night:SSW wind 13 to 18 kt becoming WSW 8 to 11 kt after midnight. Clear. Seas 3 to 4 ft.

      SSW 18kt⇓
      3-4ft

    • Friday

      Friday:W wind 6 to 9 kt becoming SW 11 to 14 kt in the afternoon. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm.   Seas 2 to 3 ft.

      ⇑SW 14kt
      2-3ft

    • Friday Night

      Friday Night:WSW wind 6 to 10 kt becoming WNW after midnight. A chance of showers before 8pm.   Seas 2 to 3 ft.

      WSW 10kt
      2-3ft

    • Independence Day

      Independence Day:WNW wind 6 to 9 kt becoming SW 9 to 12 kt in the afternoon. A chance of showers and thunderstorms after 2pm.   Seas around 2 ft.

      ⇑SW 12kt
      2ft

    • Saturday Night

      Saturday Night:WNW wind 6 to 8 kt. A chance of showers and thunderstorms before 2am.   Seas around 2 ft.

      WNW 8kt
      2ft

    • Sunday

      Sunday:NNW wind 6 to 10 kt becoming SSE in the afternoon. A chance of showers and thunderstorms after 2pm.   Seas around 2 ft.

      SSE 10kt
      2ft


Associated Zone Forecast which includes this point

Last Update: 2:10 pm EDT Jul 1, 2026
Forecast Valid: 3pm EDT Jul 1, 2026-6pm EDT Jul 8, 2026

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Detailed Forecast

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

This Afternoon
SSW wind around 18 kt. A slight chance of showers and thunderstorms after 5pm. Seas around 4 ft.
Tonight
SSW wind 19 to 22 kt decreasing to 15 to 18 kt after midnight. A slight chance of showers and thunderstorms before 11pm. Seas 4 to 5 ft.
Thursday
SW wind 10 to 15 kt. Sunny. Seas around 3 ft.
Thursday Night
SSW wind 13 to 18 kt becoming WSW 8 to 11 kt after midnight. Clear. Seas 3 to 4 ft.
Friday
W wind 6 to 9 kt becoming SW 11 to 14 kt in the afternoon. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 2 to 3 ft.
Friday Night
WSW wind 6 to 10 kt becoming WNW after midnight. A chance of showers before 8pm. Seas 2 to 3 ft.
Independence Day
WNW wind 6 to 9 kt becoming SW 9 to 12 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas around 2 ft.
Saturday Night
WNW wind 6 to 8 kt. A chance of showers and thunderstorms before 2am. Seas around 2 ft.
Sunday
NNW wind 6 to 10 kt becoming SSE in the afternoon. A chance of showers and thunderstorms after 2pm. Seas around 2 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: 2:10 pm EDT Jul 1, 2026
Forecast Valid: 3pm EDT Jul 1, 2026-6pm EDT Jul 8, 2026
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