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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:WSW wind around 18 kt. A chance of flurries.   Seas 1 ft or less.

      WSW 18kt
      < 1ft

    • Tonight

      Tonight:W wind around 16 kt. Partly cloudy. Seas 1 ft or less.

      W 16kt
      < 1ft

    • Wednesday

      Wednesday:W wind 9 to 13 kt. Increasing clouds. Seas 1 ft or less.

      W 13kt
      < 1ft

    • Wednesday Night

      Wednesday Night:W wind around 12 kt becoming NW after midnight. Partly cloudy. Seas 1 ft or less.

      W 12kt
      < 1ft

    • Thursday

      Thursday:WNW wind around 13 kt. Sunny. Seas 1 ft or less.

      WNW 13kt
      < 1ft

    • Thursday Night

      Thursday Night:WNW wind around 14 kt. Mostly clear. Seas 1 ft or less.

      WNW 14kt
      < 1ft

    • Friday

      Friday:WNW wind around 13 kt. Sunny. Seas 1 ft or less.

      WNW 13kt
      < 1ft

    • Friday Night

      Friday Night:NW wind 9 to 13 kt. Partly cloudy. Seas 1 ft or less.

      NW 13kt
      < 1ft

    • Saturday

      Saturday:N wind 9 to 12 kt increasing to 13 to 16 kt in the afternoon. Partly sunny. Seas 1 ft or less.

      ⇑N 16kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 12:48 pm EST Jan 27, 2026
Forecast Valid: 2pm EST Jan 27, 2026-6pm EST Feb 2, 2026

View Nearby Observations

Detailed Forecast

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

This Afternoon
WSW wind around 18 kt. A chance of flurries. Seas 1 ft or less.
Tonight
W wind around 16 kt. Partly cloudy. Seas 1 ft or less.
Wednesday
W wind 9 to 13 kt. Increasing clouds. Seas 1 ft or less.
Wednesday Night
W wind around 12 kt becoming NW after midnight. Partly cloudy. Seas 1 ft or less.
Thursday
WNW wind around 13 kt. Sunny. Seas 1 ft or less.
Thursday Night
WNW wind around 14 kt. Mostly clear. Seas 1 ft or less.
Friday
WNW wind around 13 kt. Sunny. Seas 1 ft or less.
Friday Night
NW wind 9 to 13 kt. Partly cloudy. Seas 1 ft or less.
Saturday
N wind 9 to 12 kt increasing to 13 to 16 kt in the afternoon. Partly 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: 12:48 pm EST Jan 27, 2026
Forecast Valid: 2pm EST Jan 27, 2026-6pm EST Feb 2, 2026
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