Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
59°F
15°C
| Humidity | 38% |
| Wind Speed | W 7 mph |
| Barometer | 30.05 in (1017.4 mb) |
| Dewpoint | 33°F (1°C) |
| Visibility | 10.00 mi |
| Last update | 6 Oct 5:56 pm EDT |
Extended Forecast for
Stony Brook NY
Tonight
Low: 44 °F
Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 58 °F
Mostly Clear
Thursday
High: 73 °F
Sunny
Thursday Night
Low: 57 °F
Mostly Clear
Friday
High: 68 °F
Sunny
Friday Night
Low: 54 °F
Mostly Clear
Saturday
High: 68 °F
Sunny
Saturday Night
Low: 58 °F
Mostly Clear
Detailed Forecast
Tonight
Clear, with a low around 44. Northwest wind 5 to 7 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 64. Light south wind increasing to 6 to 11 mph in the morning.
Wednesday Night
Mostly clear, with a low around 58. Southwest wind around 11 mph.
Thursday
Sunny, with a high near 73. Southwest wind around 9 mph.
Thursday Night
Mostly clear, with a low around 57. Northwest wind 5 to 7 mph.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 68.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 60.
Columbus Day
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
Monday Night
Mostly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 68.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Stony Brook NY
40.92°N 73.15°W (Elev. 36 ft)
40.92°N 73.15°W (Elev. 36 ft)
5:36 pm EDT Oct 6, 2026
6pm EDT Oct 6, 2026-6pm EDT Oct 13, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
