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Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog
68°F
20°C
| Humidity | 100% |
| Wind Speed | S 3 mph |
| Barometer | 29.84 in (1010.3 mb) |
| Dewpoint | 68°F (20°C) |
| Visibility | 0.25 mi |
| Last update | 19 Jun 2:56 am EDT |
Extended Forecast for
Brentwood NY
Overnight
Low: 68 °F
Mostly Cloudy
Juneteenth
High: 86 °F
Partly Sunny
then Chance
T-stormsThursday Night
Low: 68 °F
Chance
T-storms then
Chance
ShowersFriday
High: 83 °F
Sunny
Friday Night
Low: 66 °F
Mostly Clear
Saturday
High: 85 °F
Mostly Sunny
Saturday Night
Low: 68 °F
Mostly Cloudy
Sunday
High: 84 °F
Partly Sunny
Sunday Night
Low: 68 °F
Partly Cloudy
Detailed Forecast
Overnight
Mostly cloudy, with a low around 68. Light southwest wind.
Juneteenth
A chance of thunderstorms after 5pm. Partly sunny, with a high near 86. Southwest wind 6 to 16 mph. Chance of precipitation is 30%.
Thursday Night
A 40 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 68. Southwest wind 10 to 16 mph.
Friday
Sunny, with a high near 83. West wind around 11 mph.
Friday Night
Mostly clear, with a low around 66. West wind around 6 mph.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Mostly cloudy, with a low around 68.
Sunday
Partly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
Sunny, with a high near 88.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Brentwood NY
40.78°N 73.24°W (Elev. 66 ft)
40.78°N 73.24°W (Elev. 66 ft)
7:33 pm EDT Jun 18, 2025
3am EDT Jun 19, 2025-6pm EDT Jun 25, 2025
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
