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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:N wind 9 to 12 kt decreasing to 6 to 9 kt after midnight. Winds could gust as high as 21 kt. Clear. Seas 1 ft or less.

      N 12kt⇓
      < 1ft

    • Sunday

      Sunday:NE wind 7 to 12 kt becoming S in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 1 ft or less.

      S 12kt
      < 1ft

    • Sunday Night

      Sunday Night:S wind around 13 kt. Mostly cloudy. Seas 1 ft or less.

      S 13kt
      < 1ft

    • Monday

      Monday:SSW wind 13 to 18 kt, with gusts as high as 24 kt. Partly sunny. Seas 1 ft or less.

      SSW 18kt
      < 1ft

    • Monday Night

      Monday Night:WSW wind 15 to 18 kt decreasing to 9 to 12 kt after midnight. Winds could gust as high as 24 kt. A slight chance of showers before 2am. Seas 1 ft or less.

      WSW 18kt⇓
      < 1ft

    • Tuesday

      Tuesday:WSW wind 7 to 10 kt becoming SSW in the afternoon. Partly sunny. Seas 1 ft or less.

      SSW 10kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SW wind 6 to 9 kt. Mostly cloudy. Seas 1 ft or less.

      SW 9kt
      < 1ft

    • Wednesday

      Wednesday:WSW wind 6 to 10 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.

      SSW 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind 7 to 9 kt. Mostly cloudy. Seas 1 ft or less.

      SSW 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:27 pm EDT Apr 11, 2026
Forecast Valid: 6pm EDT Apr 11, 2026-6pm EDT Apr 18, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

Tonight
N wind 9 to 12 kt decreasing to 6 to 9 kt after midnight. Winds could gust as high as 21 kt. Clear. Seas 1 ft or less.
Sunday
NE wind 7 to 12 kt becoming S in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 1 ft or less.
Sunday Night
S wind around 13 kt. Mostly cloudy. Seas 1 ft or less.
Monday
SSW wind 13 to 18 kt, with gusts as high as 24 kt. Partly sunny. Seas 1 ft or less.
Monday Night
WSW wind 15 to 18 kt decreasing to 9 to 12 kt after midnight. Winds could gust as high as 24 kt. A slight chance of showers before 2am. Seas 1 ft or less.
Tuesday
WSW wind 7 to 10 kt becoming SSW in the afternoon. Partly sunny. Seas 1 ft or less.
Tuesday Night
SW wind 6 to 9 kt. Mostly cloudy. Seas 1 ft or less.
Wednesday
WSW wind 6 to 10 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.
Wednesday Night
SSW wind 7 to 9 kt. Mostly 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: 2:27 pm EDT Apr 11, 2026
Forecast Valid: 6pm EDT Apr 11, 2026-6pm EDT Apr 18, 2026
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