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Hazardous Weather Conditions

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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:SSW wind 19 to 21 kt. Mostly clear. Seas 5 to 6 ft.

      SSW 21kt
      5-6ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:S wind 17 to 20 kt increasing to 22 to 25 kt in the afternoon. Winds could gust as high as 31 kt. Sunny. Seas 4 ft building to 6 ft.

      ⇑S 25kt
      Waves Building6ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday Night

      Tuesday Night:SSW wind 27 to 30 kt. Increasing clouds. Seas 8 to 9 ft.

      SSW 30kt
      8-9ft

    • Wednesday

      Wednesday:S wind around 25 kt, with gusts as high as 32 kt. Showers, mainly after 2pm. Seas around 7 ft.

      S 25kt
      7ft

    • Wednesday Night

      Wednesday Night:SSW wind 20 to 25 kt becoming WSW 15 to 20 kt after midnight. Showers and possibly a thunderstorm before 2am, then showers likely. Seas 7 ft subsiding to 5 ft.

      SSW 25kt⇓
      7ftWaves Subsiding

    • Thursday

      Thursday:NW wind 10 to 12 kt becoming W in the afternoon. Showers likely. Seas around 4 ft.

      NW 12kt
      4ft

    • Thursday Night

      Thursday Night:W wind 9 to 12 kt becoming NW in the evening. A chance of showers before 2am. Seas 3 to 4 ft.

      NW 12kt
      3-4ft

    • Friday

      Friday:WNW wind around 13 kt becoming WSW in the afternoon. Sunny. Seas 3 to 4 ft.

      WNW 13kt
      3-4ft

    • Friday Night

      Friday Night:SW wind 9 to 12 kt. Partly cloudy. Seas around 3 ft.

      SW 12kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 7:51 pm EDT May 4, 2026
Forecast Valid: 8pm EDT May 4, 2026-6pm EDT May 11, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...

Tonight
SSW wind 19 to 21 kt. Mostly clear. Seas 5 to 6 ft.
Tuesday
S wind 17 to 20 kt increasing to 22 to 25 kt in the afternoon. Winds could gust as high as 31 kt. Sunny. Seas 4 ft building to 6 ft.
Tuesday Night
SSW wind 27 to 30 kt. Increasing clouds. Seas 8 to 9 ft.
Wednesday
S wind around 25 kt, with gusts as high as 32 kt. Showers, mainly after 2pm. Seas around 7 ft.
Wednesday Night
SSW wind 20 to 25 kt becoming WSW 15 to 20 kt after midnight. Showers and possibly a thunderstorm before 2am, then showers likely. Seas 7 ft subsiding to 5 ft.
Thursday
NW wind 10 to 12 kt becoming W in the afternoon. Showers likely. Seas around 4 ft.
Thursday Night
W wind 9 to 12 kt becoming NW in the evening. A chance of showers before 2am. Seas 3 to 4 ft.
Friday
WNW wind around 13 kt becoming WSW in the afternoon. Sunny. Seas 3 to 4 ft.
Friday Night
SW wind 9 to 12 kt. Partly cloudy. Seas around 3 ft.

Winds and seas may be higher in and near tstms.

*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: 40.53°N 73.44°W
Last Update: 7:51 pm EDT May 4, 2026
Forecast Valid: 8pm EDT May 4, 2026-6pm EDT May 11, 2026
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