Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
15°F
-9°C
| Humidity | 30% |
| Wind Speed | NW 16 G 28 mph |
| Barometer | 30.59 in (1036.0 mb) |
| Dewpoint | -11°F (-24°C) |
| Visibility | 10.00 mi |
| Wind Chill | -1°F (-18°C) |
| Last update | 24 Jan 1:56 pm EST |
Extended Forecast for
Islip NY
Winter Storm Warning January 25, 03:00am until January 26, 06:00pm
This Afternoon

High: 17 °F
Cold
Tonight
Low: 12 °F
Mostly Cloudy
then Chance
SnowSunday
High: 33 °F
Heavy Snow
then
Snow/SleetSunday Night

Low: 29 °F
Wintry Mix
Monday

High: 31 °F
Snow Likely
Monday Night

Low: 12 °F
Partly Cloudy
Tuesday

High: 21 °F
Mostly Sunny
Tuesday Night

Low: 9 °F
Partly Cloudy
Wednesday

High: 23 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Mostly sunny and cold, with a high near 17. Wind chill values between 5 and 10. North wind 8 to 10 mph.
Tonight
A 40 percent chance of snow, mainly after 4am. Mostly cloudy, with a low around 12. Wind chill values between 5 and 10. North wind around 6 mph.
Sunday
Snow before 1pm, then snow and sleet. The snow and sleet could be heavy at times. High near 33. Wind chill values between 5 and 15. Northeast wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 7 to 11 inches possible.
Sunday Night
Freezing rain and sleet before 1am, then freezing rain and sleet likely, possibly mixed with snow between 1am and 4am, then snow likely after 4am. The sleet could be heavy at times. Steady temperature around 29. Wind chill values between 15 and 20. Northeast wind 10 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of 1 to 3 inches possible.
Monday
Snow likely, mainly before 7am. Cloudy, with a high near 31. North wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 21.
Tuesday Night
Partly cloudy, with a low around 9.
Wednesday
Mostly sunny, with a high near 23.
Wednesday Night
Mostly cloudy, with a low around 12.
Thursday
Partly sunny, with a high near 22.
Thursday Night
Partly cloudy, with a low around 9.
Friday
Mostly sunny, with a high near 24.
Additional Forecasts and Information
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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)
1:15 pm EST Jan 24, 2026
2pm EST Jan 24, 2026-6pm EST Jan 30, 2026



