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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 chance of showers, mainly before 5pm.   Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. A slight chance of showers before 8pm.   Seas 1 ft or less.

      Light Wind
      < 1ft

    • Wednesday

      Wednesday:Variable winds 5 kt or less. Partly sunny, then gradually becoming sunny. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

      SSW 6kt⇓
      < 1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. A chance of showers and thunderstorms after 2pm.   Seas 1 ft or less.

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. A chance of showers before 8pm.   Seas 1 ft or less.

      Light Wind
      < 1ft

    • Friday

      Friday: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

    • Friday Night

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

      Light Wind
      < 1ft

    • Saturday

      Saturday:E wind 7 to 9 kt. A chance of showers.   Seas 1 ft or less.

      E 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:34 pm EDT Aug 18, 2026
Forecast Valid: 4pm EDT Aug 18, 2026-6pm EDT Aug 25, 2026

View Nearby Observations

Detailed Forecast


Late Afternoon
Variable winds 5 kt or less. A chance of showers, mainly before 5pm. Seas 1 ft or less.
Tonight
Variable winds 5 kt or less. A slight chance of showers before 8pm. Seas 1 ft or less.
Wednesday
Variable winds 5 kt or less. Partly sunny, then gradually becoming sunny. Seas 1 ft or less.
Wednesday Night
SSW wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Thursday
Variable winds 5 kt or less. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Thursday Night
Variable winds 5 kt or less. A chance of showers before 8pm. Seas 1 ft or less.
Friday
N wind 5 to 7 kt becoming variable and less than 5 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Friday Night
Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.
Saturday
E wind 7 to 9 kt. A chance of showers. 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: 2:34 pm EDT Aug 18, 2026
Forecast Valid: 4pm EDT Aug 18, 2026-6pm EDT Aug 25, 2026
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