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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.
Fair
64°F
18°C
| Humidity | 87% |
| Wind Speed | Calm |
| Barometer | 30.18 in (1022.0 mb) |
| Dewpoint | 60°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 25 Jul 12:56 am EDT |
Extended Forecast for
Brentwood NY
Overnight

Low: 61 °F
Mostly Cloudy
Saturday

High: 81 °F
Sunny
Saturday Night

Low: 61 °F
Mostly Clear
Sunday

High: 83 °F
Sunny
Sunday Night

Low: 65 °F
Mostly Clear
Monday

High: 84 °F
Mostly Sunny
Monday Night

Low: 68 °F
Chance
ShowersTuesday

High: 81 °F
Showers
LikelyTuesday Night

Low: 68 °F
Showers
Likely
Detailed Forecast
Overnight
Mostly cloudy, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 81. Northeast wind 6 to 13 mph becoming southeast in the afternoon.
Saturday Night
Mostly clear, with a low around 61. Southeast wind around 6 mph becoming light and variable after midnight.
Sunday
Sunny, with a high near 83. Northeast wind 7 to 9 mph becoming east in the afternoon.
Sunday Night
Mostly clear, with a low around 65. Southeast wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 84.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 68.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Mostly sunny, with a high near 85.
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)
2:50 pm EDT Jul 24, 2026
1am EDT Jul 25, 2026-6pm EDT Jul 31, 2026



