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

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

67°F

19°C

Humidity 63%
Wind Speed W 5 mph
Barometer 30.19 in (1022.4 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 23 Jul 9:56 pm EDT
Extended Forecast for

Islip NY

  • Tonight

    Tonight: Clear, with a low around 64. Light and variable wind.

    Low: 64 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 81. Calm wind becoming southeast 5 to 9 mph in the afternoon.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. East wind 5 to 7 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 81. East wind 6 to 11 mph.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64. East wind 5 to 7 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 64. Light and variable wind.
Friday
Sunny, with a high near 81. Calm wind becoming southeast 5 to 9 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 64. East wind 5 to 7 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 81. East wind 6 to 11 mph.
Saturday Night
Partly cloudy, with a low around 64. East wind 5 to 7 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 80.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 69.
Tuesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
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:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
2:21 pm EDT Jul 23, 2026
Forecast Valid:
10pm EDT Jul 23, 2026-6pm EDT Jul 30, 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