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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain

58°F

14°C

Humidity 84%
Wind Speed NE 8 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 14 May 9:56 am EDT
Extended Forecast for

Central Islip NY

  • Today

    Today: Showers and possibly a thunderstorm before 2pm, then showers likely. High near 64. Northwest wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 52. Northwest wind 3 to 5 mph.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers between 8am and 11am. Partly sunny, with a high near 65. Northwest wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 65 °F

    Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. Light southwest wind increasing to 6 to 11 mph in the morning.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm before 2pm, then showers likely. High near 64. Northwest wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 52. Northwest wind 3 to 5 mph.
Friday
A chance of showers between 8am and 11am. Partly sunny, with a high near 65. Northwest wind 6 to 8 mph. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 54. Calm wind.
Saturday
Sunny, with a high near 75. Light southwest wind increasing to 6 to 11 mph in the morning.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Central Islip NY
 40.79°N 73.2°W (Elev. 98 ft)
Last Update:
6:45 am EDT May 14, 2026
Forecast Valid:
10am EDT May 14, 2026-6pm EDT May 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation