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.

Mostly Cloudy

31°F

-1°C

Humidity 38%
Wind Speed S 8 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 10 Feb 12:56 pm EST
Extended Forecast for

Brentwood NY

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 35. South wind around 6 mph.

    High: 35 °F

    Mostly Cloudy

  • Tonight

    Tonight: Rain and snow before 1am, then a chance of drizzle or freezing rain between 1am and 4am. Low around 28. Light and variable wind. Chance of precipitation is 80%. Little or no ice accumulation expected. Little or no snow accumulation expected.

    Low: 28 °F

    Wintry Mix

  • Wednesday

    Wednesday: Sunny, with a high near 38. Wind chill values between 25 and 30. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 38 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind around 14 mph, with gusts as high as 26 mph.

    Low: 24 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 35. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.

    High: 35 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 35. South wind around 6 mph.
Tonight
Rain and snow before 1am, then a chance of drizzle or freezing rain between 1am and 4am. Low around 28. Light and variable wind. Chance of precipitation is 80%. Little or no ice accumulation expected. Little or no snow accumulation expected.
Wednesday
Sunny, with a high near 38. Wind chill values between 25 and 30. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind around 14 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 35. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.
Thursday Night
Partly cloudy, with a low around 19.
Friday
Sunny, with a high near 34.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Mostly clear, with a low around 25.
Sunday
Partly sunny, with a high near 39.
Sunday Night
A chance of rain and snow. Cloudy, with a low around 30. Chance of precipitation is 40%.
Washington's Birthday
A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 40%.
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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:
1:06 pm EST Feb 10, 2026
Forecast Valid:
1pm EST Feb 10, 2026-6pm EST Feb 16, 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