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

32°F

0°C

Humidity 82%
Wind Speed W 5 mph
Barometer 29.69 in (1005.4 mb)
Dewpoint 27°F (-3°C)
Visibility 7.00 mi
Wind Chill27°F (-3°C)
Last update 11 Feb 5:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Today

    Today: Mostly sunny, with a high near 39. West wind 5 to 15 mph, with gusts as high as 26 mph.

    High: 39 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 24. Wind chill values between 15 and 20. West wind around 11 mph, with gusts as high as 24 mph.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 34. Wind chill values between 15 and 25. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.

    High: 34 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18. Northwest wind around 6 mph.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 33. Northwest wind 6 to 9 mph.

    High: 33 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 39. West wind 5 to 15 mph, with gusts as high as 26 mph.
Tonight
Mostly clear, with a low around 24. Wind chill values between 15 and 20. West wind around 11 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 34. Wind chill values between 15 and 25. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 18. Northwest wind around 6 mph.
Friday
Sunny, with a high near 33. Northwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 38.
Saturday Night
Mostly clear, with a low around 23.
Sunday
Mostly sunny, with a high near 37.
Sunday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 28.
Washington's Birthday
A 30 percent chance of rain. Partly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Partly sunny, with a high near 41.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
1:42 am EST Feb 11, 2026
Forecast Valid:
6am EST Feb 11, 2026-6pm EST Feb 17, 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