Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Snow Fog/Mist
32°F
0°C
| Humidity | 92% |
| Wind Speed | S 3 mph |
| Barometer | 30.04 in (1017.2 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 4.00 mi |
| Last update | 18 Jan 5:56 am EST |
Extended Forecast for
Stony Brook NY
Winter Weather Advisory until January 19, 04:00am
NOW until 4:00am Mon
Winter Weather Advisory
Today
High: 36 °F
Rain/Snow and
Areas
Freezing FogTonight
Low: 22 °F
Snow then
Chance SnowM.L.King Day
High: 32 °F
Mostly Sunny
Monday Night
Low: 15 °F
Partly Cloudy
Tuesday
High: 24 °F
Mostly Sunny
Tuesday Night
Low: 13 °F
Mostly Clear
Wednesday
High: 37 °F
Mostly Sunny
Wednesday Night
Low: 28 °F
Mostly Cloudy
Detailed Forecast
Today
A chance of snow before 7am, then snow, possibly mixed with rain between 7am and 4pm, then snow after 4pm. Areas of freezing fog before 7am. High near 36. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 90%. Total daytime snow accumulation of less than one inch possible.
Tonight
Snow, mainly before 10pm. Low around 22. North wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
M.L.King Day
Mostly sunny, with a high near 32. Wind chill values between 15 and 20. Southwest wind 7 to 16 mph, with gusts as high as 29 mph.
Monday Night
Partly cloudy, with a low around 15. Wind chill values between 5 and 10. West wind 11 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 24. West wind 10 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 13.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 34.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Stony Brook NY
40.92°N 73.12°W (Elev. 112 ft)
40.92°N 73.12°W (Elev. 112 ft)
4:59 am EST Jan 18, 2026
6am EST Jan 18, 2026-6pm EST Jan 24, 2026
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