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

21°F

-6°C

Humidity 68%
Wind Speed N 6 mph
Barometer 30.09 in (1019.2 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 5 Feb 3:56 am EST
Extended Forecast for

Brentwood NY

  • Today

    Today: Sunny, with a high near 29. Wind chill values between 5 and 15. North wind 3 to 7 mph.

    High: 29 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 16. Light north wind.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 29. Wind chill values between 15 and 25. Calm wind becoming north around 5 mph.

    High: 29 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Snow likely, mainly after 1am. Cloudy, with a low around 17. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 17 °F

    Slight Chance
    Snow then
    Snow Likely

  • Saturday

    Saturday: Snow likely before noon, then a slight chance of snow showers after noon. Cloudy, with a temperature rising to near 22 by 10am, then falling to around 15 during the remainder of the day. Windy, with a northwest wind 10 to 15 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 22 °F⇓

    Snow Likely
    and Windy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 5. Blustery.

    Low: 5 °F

    Partly Cloudy
    and Blustery

  • Sunday

    Sunday: Sunny and cold, with a high near 19.

    High: 19 °F

    Cold

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 29. Wind chill values between 5 and 15. North wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 16. Light north wind.
Friday
Mostly cloudy, with a high near 29. Wind chill values between 15 and 25. Calm wind becoming north around 5 mph.
Friday Night
Snow likely, mainly after 1am. Cloudy, with a low around 17. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Saturday
Snow likely before noon, then a slight chance of snow showers after noon. Cloudy, with a temperature rising to near 22 by 10am, then falling to around 15 during the remainder of the day. Windy, with a northwest wind 10 to 15 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Saturday Night
Partly cloudy, with a low around 5. Blustery.
Sunday
Sunny and cold, with a high near 19.
Sunday Night
Mostly clear, with a low around 8.
Monday
Mostly sunny, with a high near 27.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Mostly sunny, with a high near 32.
Tuesday Night
Mostly cloudy, with a low around 20.
Wednesday
Mostly cloudy, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood NY
 40.78°N 73.24°W (Elev. 66 ft)
Last Update:
1:31 am EST Feb 5, 2026
Forecast Valid:
4am EST Feb 5, 2026-6pm EST Feb 11, 2026
 
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Additional Resources

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Chance of Precipitation