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New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

      Light Wind
      < 1ft

    • Tonight

      Tonight:S wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

      S 6kt⇓
      < 1ft

    • Monday

      Monday:Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. A slight chance of showers and thunderstorms between 2pm and 5pm. Seas 1 ft or less.

      ⇑S 7kt
      < 1ft

    • Monday Night

      Monday Night:S wind 7 to 9 kt. A chance of showers and thunderstorms, mainly after 2am. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Tuesday

      Tuesday:SSE wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am. Seas 1 ft or less.

      ⇑SSE 12kt
      < 1ft

    • Tuesday Night

      Tuesday Night:ESE wind 13 to 16 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

      ESE 16kt
      < 1ft

    • Wednesday

      Wednesday:ENE wind 16 to 18 kt, with gusts as high as 24 kt. Showers, with thunderstorms also possible after 2pm. Seas around 1 ft.

      ENE 18kt
      1ft

    • Wednesday Night

      Wednesday Night:NNE wind 14 to 16 kt, with gusts as high as 23 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Seas around 1 ft.

      NNE 16kt
      1ft

    • Thursday

      Thursday:N wind 10 to 13 kt. A chance of showers. Seas around 1 ft.

      N 13kt
      1ft


Associated Zone Forecast which includes this point

Last Update: 2:44 pm EDT Jul 26, 2026
Forecast Valid: 3pm EDT Jul 26, 2026-6pm EDT Aug 2, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Tonight
S wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. A slight chance of showers and thunderstorms between 2pm and 5pm. Seas 1 ft or less.
Monday Night
S wind 7 to 9 kt. A chance of showers and thunderstorms, mainly after 2am. Seas 1 ft or less.
Tuesday
SSE wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am. Seas 1 ft or less.
Tuesday Night
ESE wind 13 to 16 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.
Wednesday
ENE wind 16 to 18 kt, with gusts as high as 24 kt. Showers, with thunderstorms also possible after 2pm. Seas around 1 ft.
Wednesday Night
NNE wind 14 to 16 kt, with gusts as high as 23 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Seas around 1 ft.
Thursday
N wind 10 to 13 kt. A chance of showers. Seas around 1 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: 40.91°N 73.39°W
Last Update: 2:44 pm EDT Jul 26, 2026
Forecast Valid: 3pm EDT Jul 26, 2026-6pm EDT Aug 2, 2026
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