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New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • Today

      Today:E wind 9 to 11 kt. Patchy fog before 11am. Seas around 2 ft.

      E 11kt
      2ft

    • Tonight

      Tonight:ESE wind 8 to 10 kt. A chance of showers, mainly after 5am. Patchy fog after 11pm. Seas around 2 ft.

      ESE 10kt
      2ft

    • Sunday

      Sunday:S wind 9 to 12 kt becoming NW 15 to 18 kt in the morning. Winds could gust as high as 24 kt. A chance of showers and thunderstorms before 8am, then showers and possibly a thunderstorm between 8am and 2pm, then showers after 2pm. Seas 2 to 3 ft.

      ⇑NW 18kt
      2-3ft

    • Sunday Night

      Sunday Night:WNW wind 10 to 12 kt. Cloudy during the early evening, then gradual clearing. Seas 2 to 3 ft.

      WNW 12kt
      2-3ft

    • Monday

      Monday:WNW wind around 12 kt. A slight chance of showers after 2pm. Seas around 2 ft.

      WNW 12kt
      2ft

    • Monday Night

      Monday Night:N wind around 15 kt. Mostly clear. Seas around 2 ft.

      N 15kt
      2ft

    • Tuesday

      Tuesday:N wind 7 to 10 kt becoming SSW in the afternoon. Sunny. Seas 1 to 2 ft.

      N 10kt
      1-2ft

    • Tuesday Night

      Tuesday Night:SSW wind 18 to 21 kt. Partly cloudy. Seas 3 to 4 ft.

      SSW 21kt
      3-4ft

    • Wednesday

      Wednesday:SW wind 11 to 16 kt. Partly sunny. Seas around 3 ft.

      SW 16kt
      3ft


Associated Zone Forecast which includes this point

Last Update: 8:37 am EDT Apr 18, 2026
Forecast Valid: 10am EDT Apr 18, 2026-6pm EDT Apr 24, 2026

View Nearby Observations

Detailed Forecast


Today
E wind 9 to 11 kt. Patchy fog before 11am. Seas around 2 ft.
Tonight
ESE wind 8 to 10 kt. A chance of showers, mainly after 5am. Patchy fog after 11pm. Seas around 2 ft.
Sunday
S wind 9 to 12 kt becoming NW 15 to 18 kt in the morning. Winds could gust as high as 24 kt. A chance of showers and thunderstorms before 8am, then showers and possibly a thunderstorm between 8am and 2pm, then showers after 2pm. Seas 2 to 3 ft.
Sunday Night
WNW wind 10 to 12 kt. Cloudy during the early evening, then gradual clearing. Seas 2 to 3 ft.
Monday
WNW wind around 12 kt. A slight chance of showers after 2pm. Seas around 2 ft.
Monday Night
N wind around 15 kt. Mostly clear. Seas around 2 ft.
Tuesday
N wind 7 to 10 kt becoming SSW in the afternoon. Sunny. Seas 1 to 2 ft.
Tuesday Night
SSW wind 18 to 21 kt. Partly cloudy. Seas 3 to 4 ft.
Wednesday
SW wind 11 to 16 kt. Partly 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: 8:37 am EDT Apr 18, 2026
Forecast Valid: 10am EDT Apr 18, 2026-6pm EDT Apr 24, 2026
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