Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
34°F
1°C
| Humidity | 70% |
| Wind Speed | E 9 mph |
| Barometer | 30.08 in (1018.5 mb) |
| Dewpoint | 25°F (-4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 27°F (-3°C) |
| Last update | 15 Feb 6:56 pm EST |
Extended Forecast for
2 Miles NNW Stony Brook NY
Tonight
Low: 30 °F
Chance Snow
then Snow
LikelyWashington's Birthday
High: 37 °F
Chance Snow
then Mostly
SunnyMonday Night
Low: 29 °F
Mostly Cloudy
then Slight
Chance
Snow/SleetTuesday
High: 41 °F
Partly Sunny
Tuesday Night
Low: 36 °F
Increasing
CloudsWednesday
High: 39 °F
Chance Rain
then Rain
LikelyWednesday Night
Low: 33 °F
Rain Likely
then Mostly
CloudyThursday
High: 40 °F
Mostly Cloudy
Thursday Night
Low: 32 °F
Mostly Cloudy
Detailed Forecast
Tonight
Snow likely, mainly between 1am and 4am. Cloudy, with a low around 30. Wind chill values between 20 and 25. Northeast wind 7 to 10 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than one inch possible.
Washington's Birthday
A 30 percent chance of snow before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 37. Wind chill values between 20 and 30. Northeast wind 5 to 10 mph.
Monday Night
A slight chance of snow showers and sleet after 1am. Mostly cloudy, with a low around 29. Calm wind. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 41. Southwest wind 3 to 7 mph.
Tuesday Night
Increasing clouds, with a steady temperature around 36. Light southwest wind.
Wednesday
Rain likely, mainly after noon. Cloudy, with a high near 39. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely before midnight. Cloudy, with a low around 33. Chance of precipitation is 60%.
Thursday
Mostly cloudy, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 32.
Friday
Rain likely, mainly after noon. Mostly cloudy, with a high near 41. Chance of precipitation is 70%.
Friday Night
Rain likely. Cloudy, with a low around 34. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 42.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 30%.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles NNW Stony Brook NY
40.92°N 73.15°W (Elev. 36 ft)
40.92°N 73.15°W (Elev. 36 ft)
7:19 pm EST Feb 15, 2026
7pm EST Feb 15, 2026-6pm EST Feb 22, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
