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]

    • Today

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

      Light Wind
      < 1ft

    • Tonight

      Tonight:S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.

      S 7kt⇓
      < 1ft

    • Monday

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

      ⇑S 7kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 7 to 9 kt. A chance of showers and thunderstorms, then showers likely after 11pm. Seas 1 ft or less.

      SSW 9kt
      < 1ft

    • Tuesday

      Tuesday:S wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. Winds could gust as high as 20 kt. Showers likely, then showers and possibly a thunderstorm after 11am. Seas 1 ft or less.

      ⇑S 13kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SE wind around 16 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

      SE 16kt
      < 1ft

    • Wednesday

      Wednesday:SE wind around 13 kt becoming NE in the afternoon. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      SE 13kt
      < 1ft

    • Wednesday Night

      Wednesday Night:N wind around 11 kt. Showers likely and possibly a thunderstorm. Seas around 1 ft.

      N 11kt
      1ft

    • Thursday

      Thursday:NW wind 8 to 10 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      NW 10kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:49 am EDT Jul 26, 2026
Forecast Valid: 10am EDT Jul 26, 2026-6pm EDT Aug 1, 2026

View Nearby Observations

Detailed Forecast


Today
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Tonight
S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Monday
Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. A chance of thunderstorms after 5pm. Seas 1 ft or less.
Monday Night
SSW wind 7 to 9 kt. A chance of showers and thunderstorms, then showers likely after 11pm. Seas 1 ft or less.
Tuesday
S wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. Winds could gust as high as 20 kt. Showers likely, then showers and possibly a thunderstorm after 11am. Seas 1 ft or less.
Tuesday Night
SE wind around 16 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.
Wednesday
SE wind around 13 kt becoming NE in the afternoon. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Wednesday Night
N wind around 11 kt. Showers likely and possibly a thunderstorm. Seas around 1 ft.
Thursday
NW wind 8 to 10 kt. A chance of 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: 2:49 am EDT Jul 26, 2026
Forecast Valid: 10am EDT Jul 26, 2026-6pm EDT Aug 1, 2026
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