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

35°F

2°C

Humidity 37%
Wind Speed NW 8 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 13 Feb 4:56 pm EST
Extended Forecast for

Islip Terrace NY

  • Tonight

    Tonight: A 30 percent chance of snow showers after 4am. Mostly cloudy, with a low around 23. Light west wind.

    Low: 23 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Saturday

    Saturday: A 30 percent chance of snow showers before 7am. Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 6 to 11 mph.

    High: 40 °F

    Chance Snow
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 36. Calm wind becoming northeast around 5 mph.

    High: 36 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of snow showers after 4am. Mostly cloudy, with a low around 23. Light west wind.
Saturday
A 30 percent chance of snow showers before 7am. Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 6 to 11 mph.
Saturday Night
Mostly clear, with a low around 24. Calm wind.
Sunday
Partly sunny, with a high near 36. Calm wind becoming northeast around 5 mph.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 26. Calm wind.
Washington's Birthday
Partly sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 43.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 28.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
1:16 pm EST Feb 13, 2026
Forecast Valid:
5pm EST Feb 13, 2026-6pm EST Feb 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