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
18°F
-8°C
| Humidity | 84% |
| Wind Speed | N 9 mph |
| Barometer | 29.77 in (1008.1 mb) |
| Dewpoint | 14°F (-10°C) |
| Visibility | 1.25 mi |
| Wind Chill | 7°F (-14°C) |
| Last update | 26 Jan 7:56 am EST |
Extended Forecast for
Islip NY
Today

High: 31 °F
Chance Snow
Tonight

Low: 12 °F
Partly Cloudy
Tuesday

High: 22 °F
Mostly Sunny
Tuesday Night

Low: 11 °F
Mostly Clear
Wednesday

High: 23 °F
Mostly Sunny
Wednesday Night

Low: 9 °F
Mostly Cloudy
Thursday

High: 21 °F
Mostly Sunny
Thursday Night

Low: 6 °F
Mostly Clear
Friday

High: 20 °F
Cold
Detailed Forecast
Today
A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 31. Wind chill values between 15 and 20. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 12. Wind chill values between zero and 10. West wind around 14 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 22. Wind chill values between zero and 10. West wind 10 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 11. Wind chill values between -5 and 5. West wind around 11 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 23. West wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 9.
Thursday
Mostly sunny, with a high near 21.
Thursday Night
Mostly clear, with a low around 6.
Friday
Mostly sunny and cold, with a high near 20.
Friday Night
Mostly clear, with a low around 9.
Saturday
Sunny, with a high near 25.
Saturday Night
Mostly clear, with a low around 13.
Sunday
Mostly sunny, with a high near 28.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Islip NY
40.73°N 73.22°W (Elev. 7 ft)
40.73°N 73.22°W (Elev. 7 ft)
5:42 am EST Jan 26, 2026
8am EST Jan 26, 2026-6pm EST Feb 1, 2026



