Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

61°F

16°C

Humidity 52%
Wind Speed Calm
Barometer 29.81 in (1009.4 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 8 Nov 4:56 pm EST
Extended Forecast for

Brentwood NY

  • Tonight

    Tonight: Increasing clouds, with a low around 47. Light and variable wind becoming east around 6 mph after midnight.

    Low: 47 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain.  High near 60. Southeast wind 7 to 13 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Rain

  • Sunday Night

    Sunday Night: Rain or drizzle likely before 7pm, then drizzle or light rain likely between 7pm and 10pm, then showers likely after 10pm.  Patchy fog before 10pm.  Otherwise, cloudy, with a low around 51. Southeast wind around 7 mph becoming west after midnight.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Rain Likely
    and Patchy
    Fog

  • Monday

    Monday: A 50 percent chance of showers, mainly before 1pm.  Mostly cloudy, with a high near 56. West wind 6 to 11 mph.

    High: 56 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30. West wind around 11 mph.

    Low: 30 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 47. Light and variable wind becoming east around 6 mph after midnight.
Sunday
Rain. High near 60. Southeast wind 7 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain or drizzle likely before 7pm, then drizzle or light rain likely between 7pm and 10pm, then showers likely after 10pm. Patchy fog before 10pm. Otherwise, cloudy, with a low around 51. Southeast wind around 7 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 50 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 56. West wind 6 to 11 mph.
Monday Night
Partly cloudy, with a low around 30. West wind around 11 mph.
Veterans Day
Partly sunny, with a high near 44.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly clear, with a low around 37.
Friday
Mostly sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood NY
 40.78°N 73.27°W (Elev. 98 ft)
12:49 pm EST Nov 8, 2025
5pm EST Nov 8, 2025-6pm EST Nov 15, 2025
 
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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