Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

52°F

11°C

Humidity 32%
Wind Speed W 16 G 26 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 7 Apr 1:56 pm EDT
Extended Forecast for

Brentwood NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 53. Northwest wind around 17 mph.

    High: 53 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 27. Northwest wind 9 to 11 mph, with gusts as high as 23 mph.

    Low: 27 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 48. Wind chill values between 25 and 35 early. North wind around 7 mph becoming southeast in the afternoon.

    High: 48 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 33. Light southeast wind.

    Low: 33 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 50. Calm wind becoming south 5 to 8 mph in the morning.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 53. Northwest wind around 17 mph.
Tonight
Clear, with a low around 27. Northwest wind 9 to 11 mph, with gusts as high as 23 mph.
Wednesday
Sunny, with a high near 48. Wind chill values between 25 and 35 early. North wind around 7 mph becoming southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 33. Light southeast wind.
Thursday
Mostly sunny, with a high near 50. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Mostly sunny, with a high near 57.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood NY
 40.78°N 73.24°W (Elev. 66 ft)
2:35 pm EDT Apr 7, 2026
2pm EDT Apr 7, 2026-6pm EDT Apr 13, 2026
 
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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