National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

For More Weather Information:

New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:SSW wind around 15 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Seas around 4 ft.

      SSW 15kt
      4ft

    • Tonight

      Tonight:WSW wind 7 to 10 kt becoming N after midnight. Showers and possibly a thunderstorm before 11pm, then a chance of showers. Some of the storms could be severe. Seas 3 to 4 ft.

      N 10kt
      3-4ft

    • Thursday

      Thursday:NNE wind around 12 kt becoming E in the afternoon. Showers likely, mainly before 11am. Seas 2 to 3 ft.

      NE 12kt
      2-3ft

    • Thursday Night

      Thursday Night:SE wind around 6 kt becoming variable and less than 5 kt. Cloudy during the early evening, then gradual clearing. Seas around 2 ft.

      SE 6kt⇓
      2ft

    • Friday

      Friday:NE wind 13 to 16 kt becoming E in the afternoon. Increasing clouds. Seas 2 to 3 ft.

      E 16kt
      2-3ft

    • Friday Night

      Friday Night:E wind around 11 kt. A chance of showers after 2am. Seas around 3 ft.

      E 11kt
      3ft

    • Saturday

      Saturday:E wind 16 to 19 kt increasing to 19 to 22 kt in the afternoon. Showers, mainly after 8am. Seas 3 ft building to 5 ft.

      ⇑E 22kt
      Waves Building5ft

    • Saturday Night

      Saturday Night:E wind around 23 kt. Showers. Seas around 6 ft.

      E 23kt
      6ft

    • Sunday

      Sunday:E wind 16 to 19 kt decreasing to 11 to 14 kt in the afternoon. Showers likely. Seas around 6 ft.

      E 19kt⇓
      6ft


Associated Zone Forecast which includes this point

Last Update: 2:26 pm EDT May 20, 2026
Forecast Valid: 2pm EDT May 20, 2026-6pm EDT May 26, 2026

View Nearby Observations

Detailed Forecast

...SEVERE THUNDERSTORM WATCH 235 IN EFFECT UNTIL 9 PM EDT THIS

This Afternoon
SSW wind around 15 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Seas around 4 ft.
Tonight
WSW wind 7 to 10 kt becoming N after midnight. Showers and possibly a thunderstorm before 11pm, then a chance of showers. Some of the storms could be severe. Seas 3 to 4 ft.
Thursday
NNE wind around 12 kt becoming E in the afternoon. Showers likely, mainly before 11am. Seas 2 to 3 ft.
Thursday Night
SE wind around 6 kt becoming variable and less than 5 kt. Cloudy during the early evening, then gradual clearing. Seas around 2 ft.
Friday
NE wind 13 to 16 kt becoming E in the afternoon. Increasing clouds. Seas 2 to 3 ft.
Friday Night
E wind around 11 kt. A chance of showers after 2am. Seas around 3 ft.
Saturday
E wind 16 to 19 kt increasing to 19 to 22 kt in the afternoon. Showers, mainly after 8am. Seas 3 ft building to 5 ft.
Saturday Night
E wind around 23 kt. Showers. Seas around 6 ft.
Sunday
E wind 16 to 19 kt decreasing to 11 to 14 kt in the afternoon. Showers likely. Seas around 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.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

Point Forecast: 40.53°N 73.44°W
Last Update: 2:26 pm EDT May 20, 2026
Forecast Valid: 2pm EDT May 20, 2026-6pm EDT May 26, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data