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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:S wind around 12 kt. Showers, with thunderstorms also possible after 2am. Seas around 1 ft.

      S 12kt
      1ft

    • Monday

      Monday:SSE wind 5 to 8 kt becoming NNW in the afternoon. Showers likely and possibly a thunderstorm before 11am, then a slight chance of showers and thunderstorms after 5pm. Seas around 1 ft.

      SSE 8kt
      1ft

    • Monday Night

      Monday Night:Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tuesday

      Tuesday:N wind 5 to 7 kt becoming variable and less than 5 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

      N 7kt⇓
      < 1ft

    • Tuesday Night

      Tuesday Night:Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Wednesday

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

      Light Wind
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind 5 to 8 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas around 1 ft.

      SSW 8kt⇓
      1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds less than 5 kt becoming NNW around 6 kt in the evening. A chance of thunderstorms before 8pm. Seas around 1 ft.

      ⇑NNW 6kt
      1ft


Associated Zone Forecast which includes this point

Last Update: 2:20 pm EDT Aug 16, 2026
Forecast Valid: 7pm EDT Aug 16, 2026-6pm EDT Aug 23, 2026

View Nearby Observations

Detailed Forecast


Tonight
S wind around 12 kt. Showers, with thunderstorms also possible after 2am. Seas around 1 ft.
Monday
SSE wind 5 to 8 kt becoming NNW in the afternoon. Showers likely and possibly a thunderstorm before 11am, then a slight chance of showers and thunderstorms after 5pm. Seas around 1 ft.
Monday Night
Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.
Tuesday
N wind 5 to 7 kt becoming variable and less than 5 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Wednesday
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Wednesday Night
SSW wind 5 to 8 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas around 1 ft.
Thursday
Variable winds 5 kt or less. A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Thursday Night
Variable winds less than 5 kt becoming NNW around 6 kt in the evening. A chance of thunderstorms before 8pm. Seas around 1 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: 40.91°N 73.39°W
Last Update: 2:20 pm EDT Aug 16, 2026
Forecast Valid: 7pm EDT Aug 16, 2026-6pm EDT Aug 23, 2026
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