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 and Windy

5°F

-15°C

Humidity 47%
Wind Speed NW 26 G 45 mph
Barometer 30.00 in (1016.1 mb)
Dewpoint -11°F (-24°C)
Visibility 10.00 mi
Wind Chill-18°F (-28°C)
Last update 8 Feb 1:56 am EST
Extended Forecast for

Brentwood NY

Cold Weather Advisory February 8, 01:00pm until February 9, 10:00am
Extreme Cold Warning February 8, 02:55am until February 8, 01:00pm
Click here for hazard details and duration
Cold Weather Advisory
Extreme Cold Warning
  •  
    Extreme Cold Warning February 8, 02:55am until February 8, 01:00pm

    NOW until 1:00pm Sun

    Extreme Cold Warning

  • Overnight

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and cold, with a high near 18. Wind chill values between -5 and -15. Northwest wind 15 to 17 mph, with gusts as high as 34 mph.

    High: 18 °F

    Cold

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7. Wind chill values between -5 and 5. Northwest wind 8 to 13 mph, with gusts as high as 26 mph.

    Low: 7 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 30. Wind chill values between -5 and 5. Northwest wind 6 to 10 mph.

    High: 30 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. Calm wind.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 35.

    High: 35 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 28.

    Low: 28 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 3. Wind chill values between -10 and -15. Northwest wind around 18 mph, with gusts as high as 36 mph.
Sunday
Sunny and cold, with a high near 18. Wind chill values between -5 and -15. Northwest wind 15 to 17 mph, with gusts as high as 34 mph.
Sunday Night
Mostly clear, with a low around 7. Wind chill values between -5 and 5. Northwest wind 8 to 13 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 30. Wind chill values between -5 and 5. Northwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 15. Calm wind.
Tuesday
Mostly cloudy, with a high near 35.
Tuesday Night
A 30 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 28.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly clear, with a low around 22.
Thursday
Partly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 34.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brentwood NY
 40.78°N 73.24°W (Elev. 66 ft)
Last Update:
2:11 am EST Feb 8, 2026
Forecast Valid:
2am EST Feb 8, 2026-6pm EST Feb 14, 2026
 
Forecast Discussion
 
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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