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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:SW wind 11 to 14 kt, with gusts as high as 22 kt. Sunny. Seas 1 ft or less.

      SW 14kt
      < 1ft

    • Tonight

      Tonight:SSW wind 12 to 16 kt, with gusts as high as 24 kt. Increasing clouds. Seas 1 ft or less.

      SSW 16kt
      < 1ft

    • Wednesday

      Wednesday:S wind 15 to 18 kt increasing to 19 to 22 kt in the afternoon. Winds could gust as high as 29 kt. Mostly cloudy. Seas 1 ft or less.

      ⇑S 22kt
      < 1ft

    • Wednesday Night

      Wednesday Night:S wind 15 to 20 kt, with gusts as high as 26 kt. A chance of showers before 2am, then showers and possibly a thunderstorm between 2am and 5am, then showers after 5am. Seas 1 ft or less.

      S 20kt
      < 1ft

    • Thursday

      Thursday:SSE wind 8 to 11 kt. Showers, with thunderstorms also possible after 8am. Seas 1 ft or less.

      SSE 11kt
      < 1ft

    • Thursday Night

      Thursday Night:NW wind 5 to 8 kt. Showers likely, mainly before 8pm. Seas 1 ft or less.

      NW 8kt
      < 1ft

    • Friday

      Friday:NW wind around 10 kt. A chance of showers before 2pm. Seas 1 ft or less.

      NW 10kt
      < 1ft

    • Friday Night

      Friday Night:NW wind around 6 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

      NW 6kt
      < 1ft

    • Saturday

      Saturday:W wind 5 to 8 kt becoming SSW 8 to 11 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 11kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 9:26 am EDT May 12, 2026
Forecast Valid: 1pm EDT May 12, 2026-6pm EDT May 18, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
SW wind 11 to 14 kt, with gusts as high as 22 kt. Sunny. Seas 1 ft or less.
Tonight
SSW wind 12 to 16 kt, with gusts as high as 24 kt. Increasing clouds. Seas 1 ft or less.
Wednesday
S wind 15 to 18 kt increasing to 19 to 22 kt in the afternoon. Winds could gust as high as 29 kt. Mostly cloudy. Seas 1 ft or less.
Wednesday Night
S wind 15 to 20 kt, with gusts as high as 26 kt. A chance of showers before 2am, then showers and possibly a thunderstorm between 2am and 5am, then showers after 5am. Seas 1 ft or less.
Thursday
SSE wind 8 to 11 kt. Showers, with thunderstorms also possible after 8am. Seas 1 ft or less.
Thursday Night
NW wind 5 to 8 kt. Showers likely, mainly before 8pm. Seas 1 ft or less.
Friday
NW wind around 10 kt. A chance of showers before 2pm. Seas 1 ft or less.
Friday Night
NW wind around 6 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.
Saturday
W wind 5 to 8 kt becoming SSW 8 to 11 kt in the afternoon. Sunny. 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: 9:26 am EDT May 12, 2026
Forecast Valid: 1pm EDT May 12, 2026-6pm EDT May 18, 2026
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