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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SW wind 7 to 10 kt becoming S 11 to 14 kt after midnight. Winds could gust as high as 20 kt. Snow likely after 4am.   Seas 1 ft or less.

      ⇑S 14kt
      < 1ft

    • Wednesday

      Wednesday:SW wind 12 to 17 kt, with gusts as high as 23 kt. Rain and snow before noon, then a chance of rain between noon and 1pm.   Seas 1 ft or less.

      SW 17kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SW wind 9 to 12 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

      SW 12kt
      < 1ft

    • Thursday

      Thursday:WNW wind 6 to 8 kt. A chance of snow, mainly after 4pm.   Seas 1 ft or less.

      WNW 8kt
      < 1ft

    • Thursday Night

      Thursday Night:W wind 6 to 8 kt becoming NNE after midnight. A chance of snow, mainly before 4am.   Seas 1 ft or less.

      NNE 8kt
      < 1ft

    • Friday

      Friday:NNE wind 5 to 8 kt becoming NNW in the afternoon. Mostly sunny. Seas 1 ft or less.

      NNE 8kt
      < 1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Saturday

      Saturday:SSW wind 5 to 8 kt. Mostly sunny. Seas 1 ft or less.

      SSW 8kt
      < 1ft

    • Saturday Night

      Saturday Night:WSW wind around 6 kt. Partly cloudy. Seas 1 ft or less.

      WSW 6kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 4:55 pm EST Feb 24, 2026
Forecast Valid: 5pm EST Feb 24, 2026-6pm EST Mar 3, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH

Tonight
SW wind 7 to 10 kt becoming S 11 to 14 kt after midnight. Winds could gust as high as 20 kt. Snow likely after 4am. Seas 1 ft or less.
Wednesday
SW wind 12 to 17 kt, with gusts as high as 23 kt. Rain and snow before noon, then a chance of rain between noon and 1pm. Seas 1 ft or less.
Wednesday Night
SW wind 9 to 12 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.
Thursday
WNW wind 6 to 8 kt. A chance of snow, mainly after 4pm. Seas 1 ft or less.
Thursday Night
W wind 6 to 8 kt becoming NNE after midnight. A chance of snow, mainly before 4am. Seas 1 ft or less.
Friday
NNE wind 5 to 8 kt becoming NNW in the afternoon. Mostly sunny. Seas 1 ft or less.
Friday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Saturday
SSW wind 5 to 8 kt. Mostly sunny. Seas 1 ft or less.
Saturday Night
WSW wind around 6 kt. Partly cloudy. 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: 4:55 pm EST Feb 24, 2026
Forecast Valid: 5pm EST Feb 24, 2026-6pm EST Mar 3, 2026
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