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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:Variable winds 5 kt or less. Showers and possibly a thunderstorm, mainly after 5pm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tonight

      Tonight:NNE wind 8 to 10 kt. Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 5am. Some of the storms could produce heavy rainfall. Seas 1 ft or less.

      NNE 10kt
      < 1ft

    • Friday

      Friday:NE wind 7 to 11 kt. A slight chance of showers after 11am. Seas 1 ft or less.

      NE 11kt
      < 1ft

    • Friday Night

      Friday Night:ENE wind around 8 kt. Showers likely after 2am. Seas 1 ft or less.

      ENE 8kt
      < 1ft

    • Saturday

      Saturday:ENE wind 7 to 9 kt. Showers. Seas 1 ft or less.

      ENE 9kt
      < 1ft

    • Saturday Night

      Saturday Night:ENE wind around 6 kt becoming variable and less than 5 kt in the evening. Showers. Seas 1 ft or less.

      ENE 6kt⇓
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. A chance of showers. Seas 1 ft or less.

      ⇑SSW 6kt
      < 1ft

    • Sunday Night

      Sunday Night:SW wind around 6 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

      SW 6kt
      < 1ft

    • Monday

      Monday:W wind around 7 kt. Sunny. Seas 1 ft or less.

      W 7kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 5:48 am EDT Aug 20, 2026
Forecast Valid: 10am EDT Aug 20, 2026-6pm EDT Aug 26, 2026

View Nearby Observations

Detailed Forecast


Today
Variable winds 5 kt or less. Showers and possibly a thunderstorm, mainly after 5pm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Tonight
NNE wind 8 to 10 kt. Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 5am. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Friday
NE wind 7 to 11 kt. A slight chance of showers after 11am. Seas 1 ft or less.
Friday Night
ENE wind around 8 kt. Showers likely after 2am. Seas 1 ft or less.
Saturday
ENE wind 7 to 9 kt. Showers. Seas 1 ft or less.
Saturday Night
ENE wind around 6 kt becoming variable and less than 5 kt in the evening. Showers. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. A chance of showers. Seas 1 ft or less.
Sunday Night
SW wind around 6 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.
Monday
W wind around 7 kt. Sunny. 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: 5:48 am EDT Aug 20, 2026
Forecast Valid: 10am EDT Aug 20, 2026-6pm EDT Aug 26, 2026
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