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]

    • Tonight

      Tonight:SW wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

      SW 7kt⇓
      < 1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. A chance of showers, then showers likely and possibly a thunderstorm after 5pm. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds less than 5 kt becoming NE around 6 kt after midnight. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.

      ⇑NE 6kt
      < 1ft

    • Friday

      Friday:ENE wind 6 to 8 kt. A chance of showers after 8am. Seas 1 ft or less.

      ENE 8kt
      < 1ft

    • Friday Night

      Friday Night:ENE wind around 7 kt. A chance of showers. Seas 1 ft or less.

      ENE 7kt
      < 1ft

    • Saturday

      Saturday:NE wind around 8 kt becoming E in the afternoon. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      NE 8kt
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. A chance of showers and thunderstorms. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SSW around 6 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑SSW 6kt
      < 1ft

    • Sunday Night

      Sunday Night:WSW wind around 6 kt becoming WNW after midnight. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

      WSW 6kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:29 pm EDT Aug 19, 2026
Forecast Valid: 6pm EDT Aug 19, 2026-6pm EDT Aug 26, 2026

View Nearby Observations

Detailed Forecast


Tonight
SW wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Thursday
Variable winds 5 kt or less. A chance of showers, then showers likely and possibly a thunderstorm after 5pm. Seas 1 ft or less.
Thursday Night
Variable winds less than 5 kt becoming NE around 6 kt after midnight. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.
Friday
ENE wind 6 to 8 kt. A chance of showers after 8am. Seas 1 ft or less.
Friday Night
ENE wind around 7 kt. A chance of showers. Seas 1 ft or less.
Saturday
NE wind around 8 kt becoming E in the afternoon. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. A chance of showers and thunderstorms. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SSW around 6 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Sunday Night
WSW wind around 6 kt becoming WNW after midnight. A chance of showers and thunderstorms before 8pm. 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: 2:29 pm EDT Aug 19, 2026
Forecast Valid: 6pm EDT Aug 19, 2026-6pm EDT Aug 26, 2026
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