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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]

    • Today

      Today:ENE wind around 6 kt becoming WNW in the afternoon. A slight chance of showers before 11am, then a slight chance of showers after 5pm. Seas 1 ft or less.

      WNW 6kt
      < 1ft

    • Tonight

      Tonight:NW wind 8 to 10 kt. A slight chance of showers before 8pm. Seas 1 ft or less.

      NW 10kt
      < 1ft

    • Friday

      Friday:NW wind around 11 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.

      NW 11kt
      < 1ft

    • Friday Night

      Friday Night:SSW wind 7 to 10 kt becoming W after midnight. A slight chance of showers. Seas 1 ft or less.

      SSW 10kt
      < 1ft

    • Saturday

      Saturday:NNW wind 5 to 9 kt becoming S in the afternoon. A chance of rain, mainly after 2pm. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Saturday Night

      Saturday Night:S wind around 8 kt becoming NNW after midnight. A chance of rain. Seas 1 ft or less.

      S 8kt
      < 1ft

    • Sunday

      Sunday:NNW wind 11 to 14 kt becoming WNW in the afternoon. Mostly sunny. Seas 1 ft or less.

      NW 14kt
      < 1ft

    • Sunday Night

      Sunday Night:WNW wind 5 to 8 kt becoming variable and less than 5 kt. Mostly clear. Seas 1 ft or less.

      WNW 8kt⇓
      < 1ft

    • Monday

      Monday:SW wind 8 to 11 kt becoming S 14 to 19 kt in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Seas 1 ft or less.

      ⇑S 19kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 4:33 am EDT Apr 30, 2026
Forecast Valid: 10am EDT Apr 30, 2026-6pm EDT May 6, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

Today
ENE wind around 6 kt becoming WNW in the afternoon. A slight chance of showers before 11am, then a slight chance of showers after 5pm. Seas 1 ft or less.
Tonight
NW wind 8 to 10 kt. A slight chance of showers before 8pm. Seas 1 ft or less.
Friday
NW wind around 11 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.
Friday Night
SSW wind 7 to 10 kt becoming W after midnight. A slight chance of showers. Seas 1 ft or less.
Saturday
NNW wind 5 to 9 kt becoming S in the afternoon. A chance of rain, mainly after 2pm. Seas 1 ft or less.
Saturday Night
S wind around 8 kt becoming NNW after midnight. A chance of rain. Seas 1 ft or less.
Sunday
NNW wind 11 to 14 kt becoming WNW in the afternoon. Mostly sunny. Seas 1 ft or less.
Sunday Night
WNW wind 5 to 8 kt becoming variable and less than 5 kt. Mostly clear. Seas 1 ft or less.
Monday
SW wind 8 to 11 kt becoming S 14 to 19 kt in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. 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: 4:33 am EDT Apr 30, 2026
Forecast Valid: 10am EDT Apr 30, 2026-6pm EDT May 6, 2026
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