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.

Mostly Cloudy

28°F

-2°C

Humidity 51%
Wind Speed NW 16 mph
Barometer 30.03 in (1017.0 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 12 Feb 9:56 pm EST
Extended Forecast for

Islip Terrace NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 19. Northwest wind around 6 mph.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 34. Wind chill values between 10 and 20. Northwest wind 5 to 7 mph.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow showers after 1am. Partly cloudy, with a low around 24. Calm wind becoming west around 5 mph after midnight.

    Low: 24 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 6 to 9 mph, with gusts as high as 20 mph.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24. Light west wind.

    Low: 24 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 19. Northwest wind around 6 mph.
Friday
Sunny, with a high near 34. Wind chill values between 10 and 20. Northwest wind 5 to 7 mph.
Friday Night
A 30 percent chance of snow showers after 1am. Partly cloudy, with a low around 24. Calm wind becoming west around 5 mph after midnight.
Saturday
Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 6 to 9 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 24. Light west wind.
Sunday
Partly sunny, with a high near 37.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 28.
Washington's Birthday
Partly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 50 percent chance of rain. Cloudy, with a high near 44.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
9:08 pm EST Feb 12, 2026
Forecast Valid:
10pm EST Feb 12, 2026-6pm EST Feb 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation