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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:WNW wind 15 to 19 kt becoming WSW in the afternoon. Sunny. Seas 3 to 4 ft.

      WNW 19kt
      3-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:WNW wind 10 to 13 kt decreasing to 5 to 8 kt after midnight. Mostly clear. Seas 2 to 3 ft.

      WNW 13kt⇓
      2-3ft

    • Sunday

      Sunday:WNW wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Sunny. Seas around 2 ft.

      ⇑SSW 12kt
      2ft

    • Sunday Night

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

      SSW 9kt⇓
      2ft

    • Monday

      Monday:ESE wind 7 to 10 kt becoming SSE 18 to 23 kt. Showers likely, then showers and possibly a thunderstorm after 2pm. Seas 2 ft building to 4 ft.

      ⇑SSE 23kt
      Waves Building4ft

    • Monday Night

      Monday Night:S wind 18 to 23 kt becoming WSW 12 to 17 kt after midnight. Winds could gust as high as 29 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 6 ft subsiding to 4 ft.

      S 23kt⇓
      6ftWaves Subsiding

    • Tuesday

      Tuesday:NW wind 9 to 11 kt. A chance of showers before 8am. Seas around 4 ft.

      NW 11kt
      4ft

    • Tuesday Night

      Tuesday Night:W wind around 8 kt becoming NNW after midnight. Partly cloudy. Seas around 3 ft.

      W 8kt
      3ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas around 3 ft.

      ⇑SSW 9kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 2:19 am EDT Jun 20, 2026
Forecast Valid: 5am EDT Jun 20, 2026-6pm EDT Jun 26, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

Today
WNW wind 15 to 19 kt becoming WSW in the afternoon. Sunny. Seas 3 to 4 ft.
Tonight
WNW wind 10 to 13 kt decreasing to 5 to 8 kt after midnight. Mostly clear. Seas 2 to 3 ft.
Sunday
WNW wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. Sunny. Seas around 2 ft.
Sunday Night
SSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A slight chance of showers after 2am. Seas around 2 ft.
Monday
ESE wind 7 to 10 kt becoming SSE 18 to 23 kt. Showers likely, then showers and possibly a thunderstorm after 2pm. Seas 2 ft building to 4 ft.
Monday Night
S wind 18 to 23 kt becoming WSW 12 to 17 kt after midnight. Winds could gust as high as 29 kt. Showers and possibly a thunderstorm before 2am, then a chance of showers. Seas 6 ft subsiding to 4 ft.
Tuesday
NW wind 9 to 11 kt. A chance of showers before 8am. Seas around 4 ft.
Tuesday Night
W wind around 8 kt becoming NNW after midnight. Partly cloudy. Seas around 3 ft.
Wednesday
Variable winds less than 5 kt becoming SSW 5 to 9 kt in the afternoon. Sunny. Seas around 3 ft.

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: 40.53°N 73.44°W
Last Update: 2:19 am EDT Jun 20, 2026
Forecast Valid: 5am EDT Jun 20, 2026-6pm EDT Jun 26, 2026
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