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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Late Afternoon

      Late Afternoon:Variable winds 5 kt or less. A slight chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Patchy fog after 3am. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tuesday

      Tuesday:Variable winds 5 kt or less. Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Patchy fog before 10am. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tuesday Night

      Tuesday Night:ENE wind 6 to 9 kt. Showers and thunderstorms before 5am, then a chance of showers. Seas 1 ft or less.

      ENE 9kt
      < 1ft

    • Wednesday

      Wednesday:E wind around 9 kt. A chance of showers, mainly before 8am. Seas 1 ft or less.

      E 9kt
      < 1ft

    • Wednesday Night

      Wednesday Night:ESE wind 5 to 7 kt becoming SSE after midnight. Showers likely after 2am. Seas 1 ft or less.

      ESE 7kt
      < 1ft

    • Thursday

      Thursday:SW wind around 8 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      SW 8kt
      < 1ft

    • Thursday Night

      Thursday Night:WNW wind around 6 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.

      WNW 6kt
      < 1ft

    • Friday

      Friday:WNW wind around 7 kt. Mostly sunny. Seas 1 ft or less.

      WNW 7kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 3:08 pm EDT Aug 31, 2026
Forecast Valid: 4pm EDT Aug 31, 2026-6pm EDT Sep 7, 2026

View Nearby Observations

Detailed Forecast


Late Afternoon
Variable winds 5 kt or less. A slight chance of showers and thunderstorms after 5pm. Seas 1 ft or less.
Tonight
Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Patchy fog after 3am. Seas 1 ft or less.
Tuesday
Variable winds 5 kt or less. Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Patchy fog before 10am. Seas 1 ft or less.
Tuesday Night
ENE wind 6 to 9 kt. Showers and thunderstorms before 5am, then a chance of showers. Seas 1 ft or less.
Wednesday
E wind around 9 kt. A chance of showers, mainly before 8am. Seas 1 ft or less.
Wednesday Night
ESE wind 5 to 7 kt becoming SSE after midnight. Showers likely after 2am. Seas 1 ft or less.
Thursday
SW wind around 8 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Thursday Night
WNW wind around 6 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.
Friday
WNW wind around 7 kt. Mostly sunny. 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: 3:08 pm EDT Aug 31, 2026
Forecast Valid: 4pm EDT Aug 31, 2026-6pm EDT Sep 7, 2026
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