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.

Fog/Mist

40°F

4°C

Humidity 100%
Wind Speed S 8 mph
Barometer 29.83 in (1010.2 mb)
Dewpoint 40°F (4°C)
Visibility 2.50 mi
Wind Chill35°F (2°C)
Last update 8 Mar 1:56 am EDT
Extended Forecast for

Brentwood NY

Dense Fog Advisory March 8, 01:27am until March 8, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 8, 01:27am until March 8, 09:00am

    NOW until 9:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 45 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Sunday

    Sunday: A 40 percent chance of showers, mainly before 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 60. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 60 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. West wind around 5 mph becoming calm after midnight.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. South wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 55.

    High: 55 °F

    Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers. Areas of dense fog. Otherwise, cloudy, with a steady temperature around 45. Southwest wind around 9 mph.
Sunday
A 40 percent chance of showers, mainly before 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 60. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 40. West wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 58. Calm wind becoming southwest 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 39. South wind around 6 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 56.
Tuesday Night
Mostly cloudy, with a low around 42.
Wednesday
Cloudy, with a high near 55.
Wednesday Night
A 40 percent chance of showers after 1am. Cloudy, with a low around 45.
Thursday
Showers likely. Cloudy, with a high near 53. Chance of precipitation is 70%.
Thursday Night
Partly cloudy, with a low around 29.
Friday
Mostly sunny, with a high near 45.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 49.
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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:
12:47 am EST Mar 8, 2026
Forecast Valid:
1am EST Mar 8, 2026-6pm EDT Mar 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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