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

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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Sunday

      Sunday:WSW wind around 6 kt becoming WNW in the afternoon. A slight chance of showers and thunderstorms after noon. Seas 1 ft or less.

      W 6kt
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. Clear. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑SSW 8kt
      < 1ft

    • Monday Night

      Monday Night:WSW wind around 8 kt becoming W after midnight. A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Seas 1 ft or less.

      W 8kt
      < 1ft

    • Tuesday

      Tuesday:W wind around 7 kt. Mostly sunny. Seas 1 ft or less.

      W 7kt
      < 1ft

    • Tuesday Night

      Tuesday Night:W wind around 6 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas 1 ft or less.

      W 6kt⇓
      < 1ft

    • Wednesday

      Wednesday:Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Wednesday Night

      Wednesday Night:S wind around 6 kt becoming WSW after midnight. A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.

      S 6kt
      < 1ft

    • Thursday

      Thursday:W wind 5 to 8 kt. A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm. Seas 1 ft or less.

      W 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:58 am EDT Aug 9, 2026
Forecast Valid: 4am EDT Aug 9, 2026-6pm EDT Aug 15, 2026

View Nearby Observations

Detailed Forecast


Sunday
WSW wind around 6 kt becoming WNW in the afternoon. A slight chance of showers and thunderstorms after noon. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. Clear. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Monday Night
WSW wind around 8 kt becoming W after midnight. A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Seas 1 ft or less.
Tuesday
W wind around 7 kt. Mostly sunny. Seas 1 ft or less.
Tuesday Night
W wind around 6 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas 1 ft or less.
Wednesday
Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.
Wednesday Night
S wind around 6 kt becoming WSW after midnight. A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.
Thursday
W wind 5 to 8 kt. A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm. Seas 1 ft or less.

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: 40.91°N 73.39°W
Last Update: 2:58 am EDT Aug 9, 2026
Forecast Valid: 4am EDT Aug 9, 2026-6pm EDT Aug 15, 2026
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