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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:E wind around 8 kt. Sunny. Seas around 4 ft.

      E 8kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:E wind 5 to 7 kt becoming NNE after midnight. Mostly clear. Seas around 4 ft.

      E 7kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:NE wind 6 to 8 kt becoming SE in the afternoon. Increasing clouds. Seas around 4 ft.

      SE 8kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday Night

      Tuesday Night:SSE wind around 6 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas around 4 ft.

      SSE 6kt⇓
      4ft

    • Wednesday

      Wednesday:E wind 6 to 10 kt becoming SE in the afternoon. A slight chance of showers after 2pm.   Seas 3 to 4 ft.

      SE 10kt
      3-4ft

    • Wednesday Night

      Wednesday Night:SE wind 11 to 14 kt. Showers, mainly after 8pm.   Seas 3 to 4 ft.

      SE 14kt
      3-4ft

    • Thursday

      Thursday:E wind 14 to 16 kt becoming WNW in the afternoon. Showers, mainly before 2pm.   Seas around 4 ft.

      WNW 16kt
      4ft

    • Thursday Night

      Thursday Night:WNW wind around 23 kt. A chance of showers.   Seas around 5 ft.

      WNW 23kt
      5ft

    • Friday

      Friday:WNW wind 21 to 23 kt. Mostly sunny. Seas around 5 ft.

      WNW 23kt
      5ft


Associated Zone Forecast which includes this point

Last Update: 2:22 am EDT Apr 27, 2026
Forecast Valid: 1pm EDT Apr 27, 2026-6pm EDT May 3, 2026

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Detailed Forecast

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

This Afternoon
E wind around 8 kt. Sunny. Seas around 4 ft.
Tonight
E wind 5 to 7 kt becoming NNE after midnight. Mostly clear. Seas around 4 ft.
Tuesday
NE wind 6 to 8 kt becoming SE in the afternoon. Increasing clouds. Seas around 4 ft.
Tuesday Night
SSE wind around 6 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas around 4 ft.
Wednesday
E wind 6 to 10 kt becoming SE in the afternoon. A slight chance of showers after 2pm. Seas 3 to 4 ft.
Wednesday Night
SE wind 11 to 14 kt. Showers, mainly after 8pm. Seas 3 to 4 ft.
Thursday
E wind 14 to 16 kt becoming WNW in the afternoon. Showers, mainly before 2pm. Seas around 4 ft.
Thursday Night
WNW wind around 23 kt. A chance of showers. Seas around 5 ft.
Friday
WNW wind 21 to 23 kt. Mostly sunny. Seas around 5 ft.

*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: 2:22 am EDT Apr 27, 2026
Forecast Valid: 1pm EDT Apr 27, 2026-6pm EDT May 3, 2026
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