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New York, NY Local Forecast Office

9NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:SSW wind 11 to 14 km/h increasing to 15 to 18 km/h in the afternoon. A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Seas 1 m or less.

      ⇑SSW 18km/h
      < 1m

    • Tonight

      Tonight:SSW wind 10 to 13 km/h. A chance of showers and thunderstorms, mainly after 11pm. Seas 1 m or less.

      SSW 13km/h
      < 1m

    • Thursday

      Thursday:S wind 10 to 14 km/h. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 m or less.

      S 14km/h
      < 1m

    • Thursday Night

      Thursday Night:SSE wind 10 to 13 km/h. A chance of showers and thunderstorms. Seas 1 m or less.

      SSE 13km/h
      < 1m

    • Friday

      Friday:E wind 10 to 13 km/h becoming SE in the afternoon. A slight chance of showers, with thunderstorms also possible after 2pm. Seas 1 m or less.

      SE 13km/h
      < 1m

    • Friday Night

      Friday Night:SE wind 5 to 10 km/h becoming E after midnight. Mostly cloudy. Seas 1 m or less.

      SE 10km/h
      < 1m

    • Saturday

      Saturday:ENE wind 8 to 13 km/h becoming SE in the afternoon. Partly sunny. Seas 1 m or less.

      SE 13km/h
      < 1m

    • Saturday Night

      Saturday Night:SSE wind 8 to 11 km/h. Partly cloudy. Seas 1 m or less.

      SSE 11km/h
      < 1m

    • Sunday

      Sunday:SSE wind 10 to 13 km/h increasing to 13 to 16 km/h in the afternoon. Mostly sunny. Seas 1 m or less.

      ⇑SSE 16km/h
      < 1m


Associated Zone Forecast which includes this point

Last Update: 8:01 am EDT Jul 9, 2025
Forecast Valid: 10am EDT Jul 9, 2025-6pm EDT Jul 15, 2025

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Detailed Forecast


Today
SSW wind 11 to 14 km/h increasing to 15 to 18 km/h in the afternoon. A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Seas 1 m or less.
Tonight
SSW wind 10 to 13 km/h. A chance of showers and thunderstorms, mainly after 11pm. Seas 1 m or less.
Thursday
S wind 10 to 14 km/h. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 m or less.
Thursday Night
SSE wind 10 to 13 km/h. A chance of showers and thunderstorms. Seas 1 m or less.
Friday
E wind 10 to 13 km/h becoming SE in the afternoon. A slight chance of showers, with thunderstorms also possible after 2pm. Seas 1 m or less.
Friday Night
SE wind 5 to 10 km/h becoming E after midnight. Mostly cloudy. Seas 1 m or less.
Saturday
ENE wind 8 to 13 km/h becoming SE in the afternoon. Partly sunny. Seas 1 m or less.
Saturday Night
SSE wind 8 to 11 km/h. Partly cloudy. Seas 1 m or less.
Sunday
SSE wind 10 to 13 km/h increasing to 13 to 16 km/h in the afternoon. Mostly sunny. Seas 1 m 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: 40.64°N 73.36°W
Last Update: 8:01 am EDT Jul 9, 2025
Forecast Valid: 10am EDT Jul 9, 2025-6pm EDT Jul 15, 2025
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