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

For More Weather Information:

New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

    • Thursday

      Thursday:WSW wind 8 to 11 kt becoming WNW in the morning. A chance of showers and thunderstorms before 11am, then a slight chance of showers after 2pm. Seas 1 ft or less.

      WNW 11kt
      < 1ft

    • Thursday Night

      Thursday Night:NNW wind around 8 kt. A slight chance of showers before 8pm. Seas 1 ft or less.

      NNW 8kt
      < 1ft

    • Friday

      Friday:NNW wind 7 to 11 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.

      SW 11kt
      < 1ft

    • Friday Night

      Friday Night:Variable winds less than 5 kt becoming NNE 5 to 9 kt after midnight. A slight chance of showers before 2am. Seas 1 ft or less.

      ⇑NNE 9kt
      < 1ft

    • Saturday

      Saturday:NNE wind 7 to 12 kt becoming variable and less than 5 kt. Winds could gust as high as 20 kt. Sunny. Seas 1 ft or less.

      NNE 12kt⇓
      < 1ft

    • Saturday Night

      Saturday Night:S wind 6 to 9 kt becoming SSW after midnight. Partly cloudy. Seas 1 ft or less.

      S 9kt
      < 1ft

    • Sunday

      Sunday:SW wind 6 to 9 kt becoming S 11 to 16 kt in the afternoon. A chance of showers after 2pm. Seas 1 ft or less.

      ⇑S 16kt
      < 1ft

    • Sunday Night

      Sunday Night:SSW wind 15 to 18 kt, with gusts as high as 25 kt. Showers. Seas 1 ft or less.

      SSW 18kt
      < 1ft

    • Monday

      Monday:WNW wind 8 to 10 kt. A chance of showers. Seas 1 ft or less.

      WNW 10kt
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 4:30 am EDT Aug 13, 2026
Forecast Valid: 4am EDT Aug 13, 2026-6pm EDT Aug 19, 2026

View Nearby Observations

Detailed Forecast


Thursday
WSW wind 8 to 11 kt becoming WNW in the morning. A chance of showers and thunderstorms before 11am, then a slight chance of showers after 2pm. Seas 1 ft or less.
Thursday Night
NNW wind around 8 kt. A slight chance of showers before 8pm. Seas 1 ft or less.
Friday
NNW wind 7 to 11 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.
Friday Night
Variable winds less than 5 kt becoming NNE 5 to 9 kt after midnight. A slight chance of showers before 2am. Seas 1 ft or less.
Saturday
NNE wind 7 to 12 kt becoming variable and less than 5 kt. Winds could gust as high as 20 kt. Sunny. Seas 1 ft or less.
Saturday Night
S wind 6 to 9 kt becoming SSW after midnight. Partly cloudy. Seas 1 ft or less.
Sunday
SW wind 6 to 9 kt becoming S 11 to 16 kt in the afternoon. A chance of showers after 2pm. Seas 1 ft or less.
Sunday Night
SSW wind 15 to 18 kt, with gusts as high as 25 kt. Showers. Seas 1 ft or less.
Monday
WNW wind 8 to 10 kt. A chance of showers. Seas 1 ft or less.

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.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

Point Forecast: 40.62°N 73.59°W
Last Update: 4:30 am EDT Aug 13, 2026
Forecast Valid: 4am EDT Aug 13, 2026-6pm EDT Aug 19, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data