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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • Today

      Today:Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.

      ⇑S 11kt
      < 1ft

    • Tonight

      Tonight:SW wind 13 to 15 kt. Partly cloudy. Seas 1 ft or less.

      SW 15kt
      < 1ft

    • Wednesday

      Wednesday:WSW wind around 11 kt. Mostly sunny. Seas 1 ft or less.

      WSW 11kt
      < 1ft

    • Wednesday Night

      Wednesday Night:WNW wind 8 to 10 kt becoming N after midnight. Cloudy, then gradually becoming partly cloudy. Seas 1 ft or less.

      NNW 10kt
      < 1ft

    • Thursday

      Thursday:N wind 6 to 11 kt becoming NE in the afternoon. Sunny. Seas 1 ft or less.

      N 11kt
      < 1ft

    • Thursday Night

      Thursday Night:SE wind 6 to 9 kt increasing to 9 to 12 kt after midnight. Showers likely after 2am.   Seas 1 ft or less.

      ⇑SE 12kt
      < 1ft

    • Friday

      Friday:S wind around 15 kt becoming SW in the afternoon. Winds could gust as high as 21 kt. Showers.   Seas 1 ft or less.

      S 15kt
      < 1ft

    • Friday Night

      Friday Night:WNW wind 22 to 24 kt, with gusts as high as 31 kt. Showers likely.   Seas 1 ft or less.

      WNW 24kt
      < 1ft

    • Saturday

      Saturday:NW wind 20 to 24 kt, with gusts as high as 32 kt. Sunny. Seas 1 ft or less.

      NW 24kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:02 am EDT Oct 13, 2026
Forecast Valid: 5am EDT Oct 13, 2026-6pm EDT Oct 19, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE

Today
Variable winds less than 5 kt becoming S 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.
Tonight
SW wind 13 to 15 kt. Partly cloudy. Seas 1 ft or less.
Wednesday
WSW wind around 11 kt. Mostly sunny. Seas 1 ft or less.
Wednesday Night
WNW wind 8 to 10 kt becoming N after midnight. Cloudy, then gradually becoming partly cloudy. Seas 1 ft or less.
Thursday
N wind 6 to 11 kt becoming NE in the afternoon. Sunny. Seas 1 ft or less.
Thursday Night
SE wind 6 to 9 kt increasing to 9 to 12 kt after midnight. Showers likely after 2am. Seas 1 ft or less.
Friday
S wind around 15 kt becoming SW in the afternoon. Winds could gust as high as 21 kt. Showers. Seas 1 ft or less.
Friday Night
WNW wind 22 to 24 kt, with gusts as high as 31 kt. Showers likely. Seas 1 ft or less.
Saturday
NW wind 20 to 24 kt, with gusts as high as 32 kt. 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: 2:02 am EDT Oct 13, 2026
Forecast Valid: 5am EDT Oct 13, 2026-6pm EDT Oct 19, 2026
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