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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • Friday

      Friday:NW wind 7 to 11 kt becoming W in the afternoon. Partly sunny. Seas 1 ft or less.

      W 11kt
      < 1ft

    • Friday Night

      Friday Night:NNW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly cloudy, then gradually becoming clear. Seas 1 ft or less.

      NNW 7kt⇓
      < 1ft

    • Saturday

      Saturday:WSW wind 5 to 8 kt becoming S 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑S 13kt
      < 1ft

    • Saturday Night

      Saturday Night:SSW wind 15 to 18 kt decreasing to 11 to 14 kt after midnight. Partly cloudy. Seas 1 ft or less.

      SSW 18kt⇓
      < 1ft

    • Sunday

      Sunday:W wind 7 to 10 kt. Mostly sunny. Seas 1 ft or less.

      W 10kt
      < 1ft

    • Sunday Night

      Sunday Night:SW wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.

      SW 6kt⇓
      < 1ft

    • Monday

      Monday:E wind 5 to 9 kt becoming SE in the afternoon. Sunny. Seas 1 ft or less.

      ESE 9kt
      < 1ft

    • Monday Night

      Monday Night:SSE wind around 6 kt becoming SSW after midnight. Mostly clear. Seas 1 ft or less.

      SSE 6kt
      < 1ft

    • Tuesday

      Tuesday:S wind 5 to 8 kt increasing to 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑S 13kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:44 am EDT May 15, 2026
Forecast Valid: 4am EDT May 15, 2026-6pm EDT May 21, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING

Friday
NW wind 7 to 11 kt becoming W in the afternoon. Partly sunny. Seas 1 ft or less.
Friday Night
NNW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly cloudy, then gradually becoming clear. Seas 1 ft or less.
Saturday
WSW wind 5 to 8 kt becoming S 10 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.
Saturday Night
SSW wind 15 to 18 kt decreasing to 11 to 14 kt after midnight. Partly cloudy. Seas 1 ft or less.
Sunday
W wind 7 to 10 kt. Mostly sunny. Seas 1 ft or less.
Sunday Night
SW wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.
Monday
E wind 5 to 9 kt becoming SE in the afternoon. Sunny. Seas 1 ft or less.
Monday Night
SSE wind around 6 kt becoming SSW after midnight. Mostly clear. Seas 1 ft or less.
Tuesday
S wind 5 to 8 kt increasing to 10 to 13 kt in the afternoon. 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: 2:44 am EDT May 15, 2026
Forecast Valid: 4am EDT May 15, 2026-6pm EDT May 21, 2026
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