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Hazardous Weather Conditions

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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Juneteenth

      Juneteenth:W wind 11 to 13 kt becoming SW in the afternoon. Partly sunny. Seas 1 ft or less.

      SW 13kt
      < 1ft

    • Tonight

      Tonight:W wind 11 to 13 kt becoming WNW after midnight. Mostly clear. Seas 1 ft or less.

      WNW 13kt
      < 1ft

    • Saturday

      Saturday:W wind 13 to 15 kt. Sunny. Seas 1 ft or less.

      W 15kt
      < 1ft

    • Saturday Night

      Saturday Night:WNW wind 9 to 12 kt decreasing to 6 to 9 kt after midnight. Mostly clear. Seas 1 ft or less.

      WNW 12kt⇓
      < 1ft

    • Sunday

      Sunday:WNW wind 6 to 11 kt becoming SW in the afternoon. Sunny. Seas 1 ft or less.

      SW 11kt
      < 1ft

    • Sunday Night

      Sunday Night:SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of showers after 2am. Seas 1 ft or less.

      SSW 9kt⇓
      < 1ft

    • Monday

      Monday:ESE wind 9 to 12 kt becoming S 17 to 22 kt. Showers, mainly between 8am and 2pm, then rain and possibly a thunderstorm after 2pm. Seas 1 ft or less.

      ⇑S 22kt
      < 1ft

    • Monday Night

      Monday Night:SSW wind 12 to 17 kt becoming WSW after midnight. Winds could gust as high as 25 kt. Rain and possibly a thunderstorm before 8pm, then showers likely, mainly between 8pm and 2am. Seas 1 ft or less.

      SSW 17kt
      < 1ft

    • Tuesday

      Tuesday:WNW wind around 9 kt. A chance of showers. Seas 1 ft or less.

      WNW 9kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 2:29 am EDT Jun 19, 2026
Forecast Valid: 9am EDT Jun 19, 2026-6pm EDT Jun 25, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

Juneteenth
W wind 11 to 13 kt becoming SW in the afternoon. Partly sunny. Seas 1 ft or less.
Tonight
W wind 11 to 13 kt becoming WNW after midnight. Mostly clear. Seas 1 ft or less.
Saturday
W wind 13 to 15 kt. Sunny. Seas 1 ft or less.
Saturday Night
WNW wind 9 to 12 kt decreasing to 6 to 9 kt after midnight. Mostly clear. Seas 1 ft or less.
Sunday
WNW wind 6 to 11 kt becoming SW in the afternoon. Sunny. Seas 1 ft or less.
Sunday Night
SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of showers after 2am. Seas 1 ft or less.
Monday
ESE wind 9 to 12 kt becoming S 17 to 22 kt. Showers, mainly between 8am and 2pm, then rain and possibly a thunderstorm after 2pm. Seas 1 ft or less.
Monday Night
SSW wind 12 to 17 kt becoming WSW after midnight. Winds could gust as high as 25 kt. Rain and possibly a thunderstorm before 8pm, then showers likely, mainly between 8pm and 2am. Seas 1 ft or less.
Tuesday
WNW wind around 9 kt. A chance of showers. 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: 2:29 am EDT Jun 19, 2026
Forecast Valid: 9am EDT Jun 19, 2026-6pm EDT Jun 25, 2026
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