Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
56°F
13°C
| Humidity | 90% |
| Wind Speed | NE 8 mph |
| Barometer | 30.27 in (1025.1 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 4 Oct 4:56 am EDT |
Extended Forecast for
Stony Brook NY
Today
High: 63 °F
Partly Sunny
then Chance
ShowersTonight
Low: 57 °F
Chance
ShowersMonday
High: 67 °F
Becoming
SunnyMonday Night
Low: 49 °F
Clear
Tuesday
High: 61 °F
Sunny
Tuesday Night
Low: 52 °F
Clear
Wednesday
High: 65 °F
Sunny
Wednesday Night
Low: 57 °F
Mostly Clear
Thursday
High: 69 °F
Sunny
Detailed Forecast
Today
A 50 percent chance of showers after 2pm. Increasing clouds, with a high near 63. East wind 10 to 13 mph.
Tonight
A 30 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 57. Northeast wind 5 to 9 mph becoming northwest after midnight.
Monday
Partly sunny, then gradually becoming sunny, with a high near 67. Northwest wind 8 to 18 mph.
Monday Night
Clear, with a low around 49. Northwest wind 14 to 17 mph.
Tuesday
Sunny, with a high near 61. West wind around 10 mph.
Tuesday Night
Clear, with a low around 52.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 65.
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)
2:09 am EDT Oct 4, 2026
5am EDT Oct 4, 2026-6pm EDT Oct 10, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
