Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog/Mist
20°F
-7°C
| Humidity | 85% |
| Wind Speed | N 9 mph |
| Barometer | 29.75 in (1007.5 mb) |
| Dewpoint | 16°F (-9°C) |
| Visibility | 5.00 mi |
| Wind Chill | 10°F (-12°C) |
| Last update | 26 Jan 4:56 am EST |
Extended Forecast for
2 Miles NNW Stony Brook NY
Overnight

Low: 23 °F
Chance Snow
Monday

High: 30 °F
Chance Snow
Monday Night
Low: 15 °F
Blustery.
Patchy
Blowing Snow
then Mostly
ClearTuesday

High: 22 °F
Increasing
CloudsTuesday Night

Low: 13 °F
Mostly Clear
Wednesday

High: 23 °F
Mostly Sunny
Wednesday Night

Low: 11 °F
Mostly Cloudy
Thursday

High: 21 °F
Mostly Sunny
Thursday Night

Low: 7 °F
Mostly Clear
Detailed Forecast
Overnight
A 30 percent chance of snow. Cloudy, with a low around 23. Wind chill values between 15 and 20. North wind around 13 mph.
Monday
A 40 percent chance of snow before 1pm. Cloudy, with a high near 30. Wind chill values between 15 and 20. North wind 8 to 13 mph becoming northwest in the afternoon.
Monday Night
Patchy blowing snow before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Wind chill values between zero and 10. Blustery, with a northwest wind 16 to 20 mph.
Tuesday
Increasing clouds, with a high near 22. Wind chill values between zero and 10. West wind 13 to 16 mph.
Tuesday Night
Mostly clear, with a low around 13. West wind 13 to 15 mph.
Wednesday
Mostly sunny, with a high near 23.
Wednesday Night
Mostly cloudy, with a low around 11.
Thursday
Mostly sunny, with a high near 21.
Thursday Night
Mostly clear, with a low around 7.
Friday
Mostly sunny and cold, with a high near 20.
Friday Night
Mostly clear, with a low around 10.
Saturday
Sunny, with a high near 25.
Saturday Night
Mostly clear, with a low around 14.
Sunday
Mostly sunny, with a high near 28.
Additional Forecasts and Information
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ABOUT 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)
1:49 am EST Jan 26, 2026
5am EST Jan 26, 2026-6pm EST Feb 1, 2026



