National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:SSW wind around 17 kt. A slight chance of showers after 2am. Seas around 2 ft.

      SSW 17kt
      2ft

    • Wednesday

      Wednesday:SW wind 9 to 12 kt becoming W in the afternoon. A chance of showers, with thunderstorms also possible after 2pm. Seas around 1 ft.

      SW 12kt
      1ft

    • Wednesday Night

      Wednesday Night:NNE wind 5 to 8 kt becoming ENE 11 to 16 kt after midnight. Showers and possibly a thunderstorm before midnight, then showers likely. Patchy fog after 2am. Seas 1 to 2 ft.

      ⇑ENE 16kt
      1-2ft

    • Thursday

      Thursday:ENE wind 15 to 18 kt. A chance of light rain, mainly before noon. Patchy fog. Seas around 2 ft.

      ENE 18kt
      2ft

    • Thursday Night

      Thursday Night:E wind 12 to 15 kt decreasing to 9 to 12 kt after midnight. A chance of light rain, mainly before midnight. Patchy fog. Seas 1 to 2 ft.

      E 15kt⇓
      1-2ft

    • Friday

      Friday:E wind 5 to 8 kt becoming SSW in the afternoon. Areas of fog before noon. Seas around 1 ft.

      SSW 8kt
      1ft

    • Friday Night

      Friday Night:SW wind 9 to 12 kt. Mostly cloudy. Seas 1 ft or less.

      SW 12kt
      < 1ft

    • Saturday

      Saturday:WSW wind 7 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 1 ft or less.

      S 10kt
      < 1ft

    • Saturday Night

      Saturday Night:SSE wind around 12 kt. A chance of showers. Seas 1 ft or less.

      SSE 12kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 9:03 pm EDT Mar 31, 2026
Forecast Valid: 10pm EDT Mar 31, 2026-6pm EDT Apr 7, 2026

View Nearby Observations

Detailed Forecast


Tonight
SSW wind around 17 kt. A slight chance of showers after 2am. Seas around 2 ft.
Wednesday
SW wind 9 to 12 kt becoming W in the afternoon. A chance of showers, with thunderstorms also possible after 2pm. Seas around 1 ft.
Wednesday Night
NNE wind 5 to 8 kt becoming ENE 11 to 16 kt after midnight. Showers and possibly a thunderstorm before midnight, then showers likely. Patchy fog after 2am. Seas 1 to 2 ft.
Thursday
ENE wind 15 to 18 kt. A chance of light rain, mainly before noon. Patchy fog. Seas around 2 ft.
Thursday Night
E wind 12 to 15 kt decreasing to 9 to 12 kt after midnight. A chance of light rain, mainly before midnight. Patchy fog. Seas 1 to 2 ft.
Friday
E wind 5 to 8 kt becoming SSW in the afternoon. Areas of fog before noon. Seas around 1 ft.
Friday Night
SW wind 9 to 12 kt. Mostly cloudy. Seas 1 ft or less.
Saturday
WSW wind 7 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 1 ft or less.
Saturday Night
SSE wind around 12 kt. A chance of showers. Seas 1 ft or less.

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: 40.91°N 73.39°W
Last Update: 9:03 pm EDT Mar 31, 2026
Forecast Valid: 10pm EDT Mar 31, 2026-6pm EDT Apr 7, 2026
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