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Hazardous Weather Conditions

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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:NNE wind 12 to 15 kt, with gusts as high as 22 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 1 ft or less.

      NNE 15kt
      < 1ft

    • Friday

      Friday:NNE wind 10 to 15 kt. A chance of showers, mainly before 11am. Seas 1 ft or less.

      NNE 15kt
      < 1ft

    • Friday Night

      Friday Night:NE wind 6 to 8 kt. A chance of showers after 5am. Seas 1 ft or less.

      NE 8kt
      < 1ft

    • Saturday

      Saturday:NE wind around 9 kt becoming E in the afternoon. Showers likely, with thunderstorms also possible after 5pm. Seas 1 ft or less.

      NE 9kt
      < 1ft

    • Saturday Night

      Saturday Night:E wind 6 to 8 kt becoming SE after midnight. Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

      E 8kt
      < 1ft

    • Sunday

      Sunday:Variable winds less than 5 kt becoming SSW 5 to 9 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

      ⇑SSW 9kt
      < 1ft

    • Sunday Night

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

      SW 8kt
      < 1ft

    • Monday

      Monday:WSW wind 7 to 11 kt. Sunny. Seas 1 ft or less.

      WSW 11kt
      < 1ft

    • Monday Night

      Monday Night:W wind 7 to 9 kt. Mostly clear. Seas 1 ft or less.

      W 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 8:49 pm EDT Aug 20, 2026
Forecast Valid: 9pm EDT Aug 20, 2026-6pm EDT Aug 27, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

Tonight
NNE wind 12 to 15 kt, with gusts as high as 22 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 1 ft or less.
Friday
NNE wind 10 to 15 kt. A chance of showers, mainly before 11am. Seas 1 ft or less.
Friday Night
NE wind 6 to 8 kt. A chance of showers after 5am. Seas 1 ft or less.
Saturday
NE wind around 9 kt becoming E in the afternoon. Showers likely, with thunderstorms also possible after 5pm. Seas 1 ft or less.
Saturday Night
E wind 6 to 8 kt becoming SE after midnight. Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.
Sunday
Variable winds less than 5 kt becoming SSW 5 to 9 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Sunday Night
SW wind around 8 kt becoming W after midnight. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.
Monday
WSW wind 7 to 11 kt. Sunny. Seas 1 ft or less.
Monday Night
W wind 7 to 9 kt. Mostly clear. Seas 1 ft or less.

*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: 40.62°N 73.59°W
Last Update: 8:49 pm EDT Aug 20, 2026
Forecast Valid: 9pm EDT Aug 20, 2026-6pm EDT Aug 27, 2026
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