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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]

    • Today

      Today:SSW wind 20 to 23 kt increasing to 24 to 27 kt in the afternoon. Winds could gust as high as 38 kt. A chance of showers, with thunderstorms also possible after noon. Seas 1 ft or less.

      ⇑SSW 27kt
      < 1ft

    • Tonight

      Tonight:SW wind 22 to 27 kt becoming W 15 to 20 kt. Winds could gust as high as 41 kt. Partly cloudy. Seas 1 ft or less.

      SW 27kt⇓
      < 1ft

    • Juneteenth

      Juneteenth:W wind 10 to 14 kt becoming WSW in the afternoon. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.

      W 14kt
      < 1ft

    • Friday Night

      Friday Night:WNW wind around 12 kt. Mostly clear. Seas 1 ft or less.

      WNW 12kt
      < 1ft

    • Saturday

      Saturday:W wind around 14 kt. Sunny. Seas 1 ft or less.

      W 14kt
      < 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:W wind 7 to 12 kt becoming SW in the afternoon. Sunny. Seas 1 ft or less.

      SW 12kt
      < 1ft

    • Sunday Night

      Sunday Night:SSW wind 5 to 8 kt becoming variable and less than 5 kt in the evening. A chance of showers. Seas 1 ft or less.

      SSW 8kt⇓
      < 1ft

    • Monday

      Monday:SSE wind 6 to 9 kt increasing to 12 to 15 kt in the afternoon. Winds could gust as high as 21 kt. Showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

      ⇑SSE 15kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 10:36 am EDT Jun 18, 2026
Forecast Valid: 10am EDT Jun 18, 2026-6pm EDT Jun 24, 2026

View Nearby Observations

Detailed Forecast

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

Today
SSW wind 20 to 23 kt increasing to 24 to 27 kt in the afternoon. Winds could gust as high as 38 kt. A chance of showers, with thunderstorms also possible after noon. Seas 1 ft or less.
Tonight
SW wind 22 to 27 kt becoming W 15 to 20 kt. Winds could gust as high as 41 kt. Partly cloudy. Seas 1 ft or less.
Juneteenth
W wind 10 to 14 kt becoming WSW in the afternoon. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.
Friday Night
WNW wind around 12 kt. Mostly clear. Seas 1 ft or less.
Saturday
W wind around 14 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
W wind 7 to 12 kt becoming SW in the afternoon. Sunny. Seas 1 ft or less.
Sunday Night
SSW wind 5 to 8 kt becoming variable and less than 5 kt in the evening. A chance of showers. Seas 1 ft or less.
Monday
SSE wind 6 to 9 kt increasing to 12 to 15 kt in the afternoon. Winds could gust as high as 21 kt. 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: 40.62°N 73.59°W
Last Update: 10:36 am EDT Jun 18, 2026
Forecast Valid: 10am EDT Jun 18, 2026-6pm EDT Jun 24, 2026
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