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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:W wind 7 to 9 kt. Mostly clear. Seas 1 ft or less.

      W 9kt
      < 1ft

    • Monday

      Monday:WSW wind 7 to 11 kt becoming SSW in the afternoon. Sunny. Seas 1 ft or less.

      SSW 11kt
      < 1ft

    • Monday Night

      Monday Night:W wind 7 to 9 kt. Mostly clear. Seas 1 ft or less.

      W 9kt
      < 1ft

    • Tuesday

      Tuesday:W wind 7 to 10 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.

      WSW 10kt
      < 1ft

    • Tuesday Night

      Tuesday Night:W wind 6 to 8 kt becoming NW after midnight. Mostly clear. Seas 1 ft or less.

      W 8kt
      < 1ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny. Seas 1 ft or less.

      ⇑SSW 7kt
      < 1ft

    • Wednesday Night

      Wednesday Night:SSW wind around 8 kt. Partly cloudy. Seas 1 ft or less.

      SSW 8kt
      < 1ft

    • Thursday

      Thursday:SSE wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. A chance of showers. Seas 1 ft or less.

      ⇑SSE 13kt
      < 1ft

    • Thursday Night

      Thursday Night:SSE wind 7 to 12 kt. A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Seas 1 ft or less.

      SSE 12kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:20 pm EDT Aug 23, 2026
Forecast Valid: 9pm EDT Aug 23, 2026-6pm EDT Aug 30, 2026

View Nearby Observations

Detailed Forecast


Tonight
W wind 7 to 9 kt. Mostly clear. Seas 1 ft or less.
Monday
WSW wind 7 to 11 kt becoming SSW in the afternoon. Sunny. Seas 1 ft or less.
Monday Night
W wind 7 to 9 kt. Mostly clear. Seas 1 ft or less.
Tuesday
W wind 7 to 10 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
W wind 6 to 8 kt becoming NW after midnight. Mostly clear. Seas 1 ft or less.
Wednesday
Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny. Seas 1 ft or less.
Wednesday Night
SSW wind around 8 kt. Partly cloudy. Seas 1 ft or less.
Thursday
SSE wind 7 to 10 kt increasing to 10 to 13 kt in the afternoon. A chance of showers. Seas 1 ft or less.
Thursday Night
SSE wind 7 to 12 kt. A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. 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 Aug 23, 2026
Forecast Valid: 9pm EDT Aug 23, 2026-6pm EDT Aug 30, 2026
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