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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:N wind around 6 kt becoming variable and less than 5 kt in the evening. A slight chance of showers between 11pm and 2am. Seas 1 ft or less.

      N 6kt⇓
      < 1ft

    • Tuesday

      Tuesday:N wind around 6 kt becoming variable and less than 5 kt. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.

      N 6kt⇓
      < 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 less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 9kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind 6 to 9 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

      SSW 9kt
      < 1ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming S around 6 kt in the afternoon. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      ⇑S 6kt
      < 1ft

    • Thursday Night

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

      Light Wind
      < 1ft

    • Friday

      Friday:NE wind around 7 kt. A chance of showers. Seas 1 ft or less.

      NE 7kt
      < 1ft

    • Friday Night

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

      Light Wind
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 4:44 pm EDT Aug 17, 2026
Forecast Valid: 5pm EDT Aug 17, 2026-6pm EDT Aug 24, 2026

View Nearby Observations

Detailed Forecast


Tonight
N wind around 6 kt becoming variable and less than 5 kt in the evening. A slight chance of showers between 11pm and 2am. Seas 1 ft or less.
Tuesday
N wind around 6 kt becoming variable and less than 5 kt. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.
Tuesday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas 1 ft or less.
Wednesday Night
SSW wind 6 to 9 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.
Thursday
Variable winds less than 5 kt becoming S around 6 kt in the afternoon. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Thursday Night
Variable winds 5 kt or less. A chance of showers and thunderstorms. Seas 1 ft or less.
Friday
NE wind around 7 kt. A chance of showers. Seas 1 ft or less.
Friday Night
Variable winds 5 kt or less. 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: 40.62°N 73.59°W
Last Update: 4:44 pm EDT Aug 17, 2026
Forecast Valid: 5pm EDT Aug 17, 2026-6pm EDT Aug 24, 2026
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