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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Late Afternoon

      Late Afternoon:Variable winds 5 kt or less. A slight chance of showers and thunderstorms. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 7pm. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Saturday

      Saturday:Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      ⇑S 7kt
      < 1ft

    • Saturday Night

      Saturday Night:S wind 6 to 9 kt. Mostly cloudy. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Sunday

      Sunday:S wind 8 to 11 kt. Partly sunny. Seas 1 ft or less.

      S 11kt
      < 1ft

    • Sunday Night

      Sunday Night:S wind 7 to 9 kt. Showers after 2am. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Monday

      Monday:SSW wind 8 to 10 kt. Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.

      SSW 10kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 6 to 8 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Seas 1 ft or less.

      SSW 8kt
      < 1ft

    • Tuesday

      Tuesday:SE wind around 6 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      SE 6kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 4:03 pm EDT Jul 31, 2026
Forecast Valid: 4pm EDT Jul 31, 2026-6pm EDT Aug 7, 2026

View Nearby Observations

Detailed Forecast


Late Afternoon
Variable winds 5 kt or less. A slight chance of showers and thunderstorms. Seas 1 ft or less.
Tonight
Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 7pm. Seas 1 ft or less.
Saturday
Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Saturday Night
S wind 6 to 9 kt. Mostly cloudy. Seas 1 ft or less.
Sunday
S wind 8 to 11 kt. Partly sunny. Seas 1 ft or less.
Sunday Night
S wind 7 to 9 kt. Showers after 2am. Seas 1 ft or less.
Monday
SSW wind 8 to 10 kt. Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Monday Night
SSW wind 6 to 8 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Tuesday
SE wind around 6 kt. A chance of showers, with thunderstorms also possible after 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: 4:03 pm EDT Jul 31, 2026
Forecast Valid: 4pm EDT Jul 31, 2026-6pm EDT Aug 7, 2026
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