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.

Fair

18°F

-8°C

Humidity 77%
Wind Speed NE 3 mph
Barometer 29.87 in (1011.7 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 6 Feb 12:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Extreme Cold Watch February 7, 06:00pm until February 8, 01:00pm
Click here for hazard details and duration
Extreme Cold Watch

  • Overnight

    Overnight: Mostly cloudy, with a low around 16. Wind chill values between 10 and 15. North wind 3 to 6 mph.

    Low: 16 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 30. Wind chill values between 10 and 20. North wind around 6 mph becoming calm in the afternoon.

    High: 30 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Snow, mainly after 1am. Low around 15. Light southwest wind. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 15 °F

    Chance Snow
    then Snow

  • Saturday

    Saturday: Snow, mainly before 1pm. Temperature falling to around 17 by 5pm. Wind chill values between zero and 10. Windy, with a northwest wind 7 to 17 mph increasing to 19 to 29 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 24 °F⇓

    Snow and
    Windy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 44 mph.

    Low: 4 °F

    Decreasing
    Clouds and
    Windy

  • Sunday

    Sunday: Sunny and cold, with a high near 17. Blustery.

    High: 17 °F

    Cold and
    Blustery

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 16. Wind chill values between 10 and 15. North wind 3 to 6 mph.
Friday
Mostly cloudy, with a high near 30. Wind chill values between 10 and 20. North wind around 6 mph becoming calm in the afternoon.
Friday Night
Snow, mainly after 1am. Low around 15. Light southwest wind. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Snow, mainly before 1pm. Temperature falling to around 17 by 5pm. Wind chill values between zero and 10. Windy, with a northwest wind 7 to 17 mph increasing to 19 to 29 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 44 mph.
Sunday
Sunny and cold, with a high near 17. Blustery.
Sunday Night
Mostly clear, with a low around 7.
Monday
Mostly sunny, with a high near 25.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 29.
Tuesday Night
Mostly cloudy, with a low around 19.
Wednesday
A 30 percent chance of rain. Mostly sunny, with a high near 36.
Wednesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 24.
Thursday
Mostly cloudy, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
1:09 pm EST Feb 5, 2026
Forecast Valid:
1am EST Feb 6, 2026-6pm EST Feb 12, 2026
 
Forecast Discussion
 
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Additional Resources

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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