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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]

    • Tonight

      Tonight:SW wind 18 to 21 kt decreasing to 14 to 17 kt after midnight. Partly cloudy. Seas 4 to 5 ft.

      SW 21kt⇓
      4-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Wednesday

      Wednesday:SSW wind 12 to 16 kt. A chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Seas around 4 ft.

      SSW 16kt
      4ft

      Small Craft Advisory
      Small Craft Advisory

    • Wednesday Night

      Wednesday Night:W wind 8 to 10 kt becoming N after midnight. Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Seas 3 to 4 ft.

      N 10kt
      3-4ft

    • Thursday

      Thursday:N wind 7 to 11 kt becoming E in the afternoon. A chance of showers before 2pm. Seas 2 to 3 ft.

      N 11kt
      2-3ft

    • Thursday Night

      Thursday Night:SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Seas around 2 ft.

      SSE 6kt⇓
      2ft

    • Friday

      Friday:ENE wind around 11 kt becoming ESE in the afternoon. A chance of showers after 2pm. Seas around 2 ft.

      ENE 11kt
      2ft

    • Friday Night

      Friday Night:ESE wind 7 to 10 kt. Showers likely, mainly after 2am. Seas around 2 ft.

      ESE 10kt
      2ft

    • Saturday

      Saturday:E wind 15 to 19 kt. Showers. Seas 3 to 4 ft.

      E 19kt
      3-4ft

    • Saturday Night

      Saturday Night:E wind around 19 kt. Showers. Seas around 5 ft.

      E 19kt
      5ft


Associated Zone Forecast which includes this point

Last Update: 2:23 pm EDT May 19, 2026
Forecast Valid: 6pm EDT May 19, 2026-6pm EDT May 26, 2026

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Detailed Forecast

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

Tonight
SW wind 18 to 21 kt decreasing to 14 to 17 kt after midnight. Partly cloudy. Seas 4 to 5 ft.
Wednesday
SSW wind 12 to 16 kt. A chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Seas around 4 ft.
Wednesday Night
W wind 8 to 10 kt becoming N after midnight. Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Seas 3 to 4 ft.
Thursday
N wind 7 to 11 kt becoming E in the afternoon. A chance of showers before 2pm. Seas 2 to 3 ft.
Thursday Night
SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Seas around 2 ft.
Friday
ENE wind around 11 kt becoming ESE in the afternoon. A chance of showers after 2pm. Seas around 2 ft.
Friday Night
ESE wind 7 to 10 kt. Showers likely, mainly after 2am. Seas around 2 ft.
Saturday
E wind 15 to 19 kt. Showers. Seas 3 to 4 ft.
Saturday Night
E wind around 19 kt. Showers. Seas around 5 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: 2:23 pm EDT May 19, 2026
Forecast Valid: 6pm EDT May 19, 2026-6pm EDT May 26, 2026
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