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

Hazardous Weather Conditions

For More Weather Information:

New York, NY Local Forecast Office

12NM NW Islip NY

Marine Point Forecast

[NOTICE]

    • Late Afternoon

      Late Afternoon:S wind around 10 kt. A chance of showers and thunderstorms. Some of the storms could be severe. Seas 1 ft or less.

      S 10kt
      < 1ft

    • Tonight

      Tonight:SW wind 12 to 14 kt becoming W after midnight. Winds could gust as high as 20 kt. Showers and thunderstorms, mainly before 11pm. Some of the storms could be severe. Seas 1 ft or less.

      SW 14kt
      < 1ft

    • Sunday

      Sunday:NW wind 10 to 12 kt. Partly sunny, then gradually becoming sunny. Seas 1 ft or less.

      NW 12kt
      < 1ft

    • Sunday Night

      Sunday Night:N wind around 6 kt. Mostly clear. Seas 1 ft or less.

      N 6kt
      < 1ft

    • Monday

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

      Light Wind
      < 1ft

    • Monday Night

      Monday Night:S wind 6 to 9 kt. Partly cloudy. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Tuesday

      Tuesday:SSE wind 9 to 12 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.

      SSE 12kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SSE wind around 13 kt becoming SSW after midnight. Winds could gust as high as 20 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

      SSE 13kt
      < 1ft

    • Wednesday

      Wednesday:SW wind 10 to 13 kt. Showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      SW 13kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 3:52 pm EDT Jul 18, 2026
Forecast Valid: 5pm EDT Jul 18, 2026-6pm EDT Jul 25, 2026

View Nearby Observations

Detailed Forecast


Late Afternoon
S wind around 10 kt. A chance of showers and thunderstorms. Some of the storms could be severe. Seas 1 ft or less.
Tonight
SW wind 12 to 14 kt becoming W after midnight. Winds could gust as high as 20 kt. Showers and thunderstorms, mainly before 11pm. Some of the storms could be severe. Seas 1 ft or less.
Sunday
NW wind 10 to 12 kt. Partly sunny, then gradually becoming sunny. Seas 1 ft or less.
Sunday Night
N wind around 6 kt. Mostly clear. Seas 1 ft or less.
Monday
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Monday Night
S wind 6 to 9 kt. Partly cloudy. Seas 1 ft or less.
Tuesday
SSE wind 9 to 12 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Seas 1 ft or less.
Tuesday Night
SSE wind around 13 kt becoming SSW after midnight. Winds could gust as high as 20 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.
Wednesday
SW wind 10 to 13 kt. Showers, with thunderstorms also possible after 2pm. 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: 3:52 pm EDT Jul 18, 2026
Forecast Valid: 5pm EDT Jul 18, 2026-6pm EDT Jul 25, 2026
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