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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
62°F
17°C
| Humidity | 90% |
| Wind Speed | N 3 mph |
| Barometer | 30.15 in (1020.9 mb) |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 25 Jul 2:56 am EDT |
Extended Forecast for
Brentwood NY
Overnight

Low: 61 °F
Partly Cloudy
Saturday

High: 81 °F
Sunny
Saturday Night

Low: 62 °F
Clear
Sunday

High: 83 °F
Sunny
Sunday Night

Low: 65 °F
Mostly Clear
Monday

High: 83 °F
Mostly Sunny
Monday Night
Low: 68 °F
Mostly Cloudy
then Chance
ShowersTuesday

High: 82 °F
Showers
Tuesday Night

Low: 67 °F
Showers
Detailed Forecast
Overnight
Partly cloudy, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 81. East wind 5 to 10 mph.
Saturday Night
Clear, with a low around 62. East wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 83. Northeast wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 65. South wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 83.
Monday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 68.
Tuesday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 82. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 67. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 81.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 84.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Brentwood NY
40.78°N 73.27°W (Elev. 98 ft)
40.78°N 73.27°W (Elev. 98 ft)
2:44 am EDT Jul 25, 2026
3am EDT Jul 25, 2026-6pm EDT Jul 31, 2026


