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Hazardous Weather Conditions

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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:S wind 19 to 24 kt, with gusts as high as 33 kt. A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 4 ft building to 6 ft.

      S 24kt
      Waves Building6ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:SW wind 17 to 20 kt becoming W 14 to 17 kt after midnight. Winds could gust as high as 28 kt. A slight chance of showers before 8pm. Seas 6 ft subsiding to 4 ft.

      SW 20kt⇓
      6ftWaves Subsiding

      Small Craft Advisory
      Small Craft Advisory

    • Juneteenth

      Juneteenth:W wind 11 to 14 kt becoming SW in the afternoon. Cloudy through mid morning, then gradual clearing. Seas around 4 ft.

      SW 14kt
      4ft

    • Friday Night

      Friday Night:WNW wind 12 to 14 kt. Mostly clear. Seas 3 to 4 ft.

      WNW 14kt
      3-4ft

    • Saturday

      Saturday:W wind around 15 kt. Sunny. Seas around 3 ft.

      W 15kt
      3ft

    • Saturday Night

      Saturday Night:WNW wind 8 to 13 kt. Mostly clear. Seas 2 to 3 ft.

      WNW 13kt
      2-3ft

    • Sunday

      Sunday:W wind 8 to 13 kt becoming SSW in the afternoon. Mostly sunny. Seas around 2 ft.

      SSW 13kt
      2ft

    • Sunday Night

      Sunday Night:SSW wind 9 to 12 kt decreasing to 5 to 8 kt after midnight. A chance of showers. Seas 2 to 3 ft.

      SSW 12kt⇓
      2-3ft

    • Monday

      Monday:SSE wind 8 to 13 kt increasing to 16 to 21 kt. Showers, with thunderstorms also possible after 2pm. Seas 3 ft building to 6 ft.

      ⇑SSE 21kt
      Waves Building6ft


Associated Zone Forecast which includes this point

Last Update: 2:43 am EDT Jun 18, 2026
Forecast Valid: 6am EDT Jun 18, 2026-6pm EDT Jun 24, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING

Today
S wind 19 to 24 kt, with gusts as high as 33 kt. A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 4 ft building to 6 ft.
Tonight
SW wind 17 to 20 kt becoming W 14 to 17 kt after midnight. Winds could gust as high as 28 kt. A slight chance of showers before 8pm. Seas 6 ft subsiding to 4 ft.
Juneteenth
W wind 11 to 14 kt becoming SW in the afternoon. Cloudy through mid morning, then gradual clearing. Seas around 4 ft.
Friday Night
WNW wind 12 to 14 kt. Mostly clear. Seas 3 to 4 ft.
Saturday
W wind around 15 kt. Sunny. Seas around 3 ft.
Saturday Night
WNW wind 8 to 13 kt. Mostly clear. Seas 2 to 3 ft.
Sunday
W wind 8 to 13 kt becoming SSW in the afternoon. Mostly sunny. Seas around 2 ft.
Sunday Night
SSW wind 9 to 12 kt decreasing to 5 to 8 kt after midnight. A chance of showers. Seas 2 to 3 ft.
Monday
SSE wind 8 to 13 kt increasing to 16 to 21 kt. Showers, with thunderstorms also possible after 2pm. Seas 3 ft building to 6 ft.

*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: 40.53°N 73.44°W
Last Update: 2:43 am EDT Jun 18, 2026
Forecast Valid: 6am EDT Jun 18, 2026-6pm EDT Jun 24, 2026
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