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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • Friday

      Friday:SW wind 5 to 8 kt becoming S 10 to 15 kt in the afternoon. Winds could gust as high as 21 kt. A chance of rain after 5pm.   Seas 1 ft or less.

      ⇑S 15kt
      < 1ft

    • Friday Night

      Friday Night:SSW wind 16 to 19 kt becoming WSW 11 to 14 kt after midnight. Rain, mainly before 2am.   Seas 1 ft or less.

      SSW 19kt⇓
      < 1ft

    • Saturday

      Saturday:NNW wind around 10 kt. Sunny. Seas 1 ft or less.

      NNW 10kt
      < 1ft

    • Saturday Night

      Saturday Night:N wind around 7 kt becoming SSE after midnight. Mostly cloudy. Seas 1 ft or less.

      N 7kt
      < 1ft

    • Sunday

      Sunday:S wind 8 to 12 kt. A slight chance of rain after 2pm.   Seas 1 ft or less.

      S 12kt
      < 1ft

    • Sunday Night

      Sunday Night:S wind around 12 kt becoming E after midnight. Rain likely, mainly after 2am.   Seas 1 ft or less.

      S 12kt
      < 1ft

    • Monday

      Monday:N wind around 14 kt. Rain likely, mainly before 8am.   Seas 1 ft or less.

      N 14kt
      < 1ft

    • Monday Night

      Monday Night:NNW wind around 9 kt. Partly cloudy. Seas 1 ft or less.

      NNW 9kt
      < 1ft

    • Tuesday

      Tuesday:NNW wind around 8 kt becoming WSW in the afternoon. Mostly sunny. Seas 1 ft or less.

      NNW 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:26 am EDT Mar 20, 2026
Forecast Valid: 3am EDT Mar 20, 2026-6pm EDT Mar 26, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON

Friday
SW wind 5 to 8 kt becoming S 10 to 15 kt in the afternoon. Winds could gust as high as 21 kt. A chance of rain after 5pm. Seas 1 ft or less.
Friday Night
SSW wind 16 to 19 kt becoming WSW 11 to 14 kt after midnight. Rain, mainly before 2am. Seas 1 ft or less.
Saturday
NNW wind around 10 kt. Sunny. Seas 1 ft or less.
Saturday Night
N wind around 7 kt becoming SSE after midnight. Mostly cloudy. Seas 1 ft or less.
Sunday
S wind 8 to 12 kt. A slight chance of rain after 2pm. Seas 1 ft or less.
Sunday Night
S wind around 12 kt becoming E after midnight. Rain likely, mainly after 2am. Seas 1 ft or less.
Monday
N wind around 14 kt. Rain likely, mainly before 8am. Seas 1 ft or less.
Monday Night
NNW wind around 9 kt. Partly cloudy. Seas 1 ft or less.
Tuesday
NNW wind around 8 kt becoming WSW in the afternoon. 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: 2:26 am EDT Mar 20, 2026
Forecast Valid: 3am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
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