National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:S wind around 6 kt becoming SW after midnight. A chance of showers and thunderstorms, mainly before 11pm. Seas 1 ft or less.

      S 6kt
      < 1ft

    • Juneteenth

      Juneteenth:SSW wind 8 to 11 kt increasing to 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. A chance of thunderstorms after 5pm. Some of the storms could be severe. Seas 1 ft or less.

      ⇑SSW 16kt
      < 1ft

    • Thursday Night

      Thursday Night:WSW wind 18 to 21 kt decreasing to 12 to 15 kt in the evening. Winds could gust as high as 27 kt. A chance of showers and thunderstorms before 2am. Some of the storms could be severe. Seas 1 ft or less.

      WSW 21kt⇓
      < 1ft

    • Friday

      Friday:W wind 10 to 12 kt. Sunny. Seas 1 ft or less.

      W 12kt
      < 1ft

    • Friday Night

      Friday Night:W wind 5 to 9 kt. Mostly clear. Seas 1 ft or less.

      W 9kt
      < 1ft

    • Saturday

      Saturday:W wind 5 to 9 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.

      SSW 9kt
      < 1ft

    • Saturday Night

      Saturday Night:SW wind 9 to 11 kt. Mostly cloudy. Seas 1 ft or less.

      SW 11kt
      < 1ft

    • Sunday

      Sunday:SW wind 9 to 11 kt. Partly sunny. Seas 1 ft or less.

      SW 11kt
      < 1ft

    • Sunday Night

      Sunday Night:SW wind 6 to 9 kt becoming WNW after midnight. Partly cloudy. Seas 1 ft or less.

      SW 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 7:33 pm EDT Jun 18, 2025
Forecast Valid: 8pm EDT Jun 18, 2025-6pm EDT Jun 25, 2025

View Nearby Observations

Detailed Forecast


Tonight
S wind around 6 kt becoming SW after midnight. A chance of showers and thunderstorms, mainly before 11pm. Seas 1 ft or less.
Juneteenth
SSW wind 8 to 11 kt increasing to 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. A chance of thunderstorms after 5pm. Some of the storms could be severe. Seas 1 ft or less.
Thursday Night
WSW wind 18 to 21 kt decreasing to 12 to 15 kt in the evening. Winds could gust as high as 27 kt. A chance of showers and thunderstorms before 2am. Some of the storms could be severe. Seas 1 ft or less.
Friday
W wind 10 to 12 kt. Sunny. Seas 1 ft or less.
Friday Night
W wind 5 to 9 kt. Mostly clear. Seas 1 ft or less.
Saturday
W wind 5 to 9 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.
Saturday Night
SW wind 9 to 11 kt. Mostly cloudy. Seas 1 ft or less.
Sunday
SW wind 9 to 11 kt. Partly sunny. Seas 1 ft or less.
Sunday Night
SW wind 6 to 9 kt becoming WNW after midnight. Partly cloudy. 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: 7:33 pm EDT Jun 18, 2025
Forecast Valid: 8pm EDT Jun 18, 2025-6pm EDT Jun 25, 2025
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