Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast and Breezy
48°F
9°C
| Humidity | 66% |
| Wind Speed | E 21 G 29 mph |
| Barometer | 30.26 in (1024.8 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 4 Apr 5:56 pm EDT |
Extended Forecast for
Stony Brook NY
Tonight

Low: 42 °F
Chance
Showers and
Areas Dense
FogSunday

High: 60 °F
Showers and
Areas Dense
FogSunday Night
Low: 40 °F
Chance
Showers then
Partly CloudyMonday

High: 54 °F
Sunny
Monday Night

Low: 39 °F
Slight Chance
RainTuesday

High: 51 °F
Mostly Sunny
Tuesday Night

Low: 31 °F
Mostly Clear
Wednesday

High: 47 °F
Sunny
Wednesday Night

Low: 36 °F
Mostly Clear
Detailed Forecast
Tonight
A chance of showers between 11pm and 2am, then areas of drizzle with a chance of showers after 2am. The drizzle could be heavy at times. Areas of dense fog after 2am. Otherwise, cloudy, with a low around 42. East wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Sunday
Areas of drizzle with a chance of showers before 11am, then showers, mainly between 11am and 5pm. The drizzle could be heavy at times. Areas of dense fog before 11am. High near 60. Southwest wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of showers, mainly before 8pm. Cloudy during the early evening, then gradual clearing, with a low around 40. Northwest wind around 11 mph.
Monday
Sunny, with a high near 54. West wind around 11 mph.
Monday Night
A 20 percent chance of rain. Partly cloudy, with a low around 39. West wind around 6 mph.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Mostly clear, with a low around 31.
Wednesday
Sunny, with a high near 47.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Mostly sunny, with a high near 55.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 58.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT 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)
2:50 pm EDT Apr 4, 2026
6pm EDT Apr 4, 2026-6pm EDT Apr 11, 2026


