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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:WSW wind 9 to 12 kt becoming NNW 6 to 9 kt after midnight. A slight chance of showers and thunderstorms before 11pm. Widespread smoke, mainly after 8pm. Seas 1 ft or less.

      WSW 12kt⇓
      < 1ft

    • Friday

      Friday:Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Areas of smoke. Seas 1 ft or less.

      ⇑S 8kt
      < 1ft

    • Friday Night

      Friday Night:SSW wind around 8 kt. Patchy smoke. Seas 1 ft or less.

      SSW 8kt
      < 1ft

    • Saturday

      Saturday:SSW wind 8 to 11 kt increasing to 13 to 16 kt in the afternoon. Showers likely, then showers and possibly a thunderstorm after 2pm. Areas of smoke before 8am. Seas 1 ft or less.

      ⇑SSW 16kt
      < 1ft

    • Saturday Night

      Saturday Night:S wind around 16 kt becoming WSW after midnight. Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.

      S 16kt
      < 1ft

    • Sunday

      Sunday:NW wind 9 to 11 kt. A chance of showers before 8am. Seas 1 ft or less.

      NW 11kt
      < 1ft

    • Sunday Night

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

      N 6kt
      < 1ft

    • Monday

      Monday:NNE wind 5 to 8 kt becoming SSE in the afternoon. Sunny. Seas 1 ft or less.

      SSE 8kt
      < 1ft

    • Monday Night

      Monday Night:S wind 6 to 8 kt. Partly cloudy. Seas 1 ft or less.

      S 8kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:20 pm EDT Jul 16, 2026
Forecast Valid: 6pm EDT Jul 16, 2026-6pm EDT Jul 23, 2026

View Nearby Observations

Detailed Forecast


Tonight
WSW wind 9 to 12 kt becoming NNW 6 to 9 kt after midnight. A slight chance of showers and thunderstorms before 11pm. Widespread smoke, mainly after 8pm. Seas 1 ft or less.
Friday
Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Areas of smoke. Seas 1 ft or less.
Friday Night
SSW wind around 8 kt. Patchy smoke. Seas 1 ft or less.
Saturday
SSW wind 8 to 11 kt increasing to 13 to 16 kt in the afternoon. Showers likely, then showers and possibly a thunderstorm after 2pm. Areas of smoke before 8am. Seas 1 ft or less.
Saturday Night
S wind around 16 kt becoming WSW after midnight. Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Seas 1 ft or less.
Sunday
NW wind 9 to 11 kt. A chance of showers before 8am. Seas 1 ft or less.
Sunday Night
N wind around 6 kt. Mostly clear. Seas 1 ft or less.
Monday
NNE wind 5 to 8 kt becoming SSE in the afternoon. Sunny. Seas 1 ft or less.
Monday Night
S wind 6 to 8 kt. Partly cloudy. 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: 40.62°N 73.59°W
Last Update: 2:20 pm EDT Jul 16, 2026
Forecast Valid: 6pm EDT Jul 16, 2026-6pm EDT Jul 23, 2026
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