Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
19°F
-7°C
| Humidity | 41% |
| Wind Speed | W 13 mph |
| Barometer | 30.38 in (1028.8 mb) |
| Dewpoint | -1°F (-18°C) |
| Visibility | 10.00 mi |
| Wind Chill | 6°F (-14°C) |
| Last update | 20 Jan 5:56 pm EST |
Extended Forecast for
Islip Terrace NY
Tonight

Low: 12 °F
Mostly Clear
Wednesday

High: 38 °F
Increasing
CloudsWednesday Night
Low: 36 °F
Cloudy then
Slight Chance
Rain/SnowThursday

High: 44 °F
Mostly Sunny
Thursday Night

Low: 26 °F
Mostly Cloudy
Friday

High: 34 °F
Mostly Cloudy
Friday Night

Low: 10 °F
Partly Cloudy
Saturday

High: 19 °F
Cold
Saturday Night
Low: 11 °F
Mostly Cloudy
then Chance
Snow
Detailed Forecast
Tonight
Mostly clear, with a low around 12. Wind chill values between 5 and 10. West wind 5 to 8 mph, with gusts as high as 20 mph.
Wednesday
Increasing clouds, with a high near 38. Wind chill values between 10 and 20. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 22 mph.
Wednesday Night
A slight chance of rain and snow between 1am and 4am, then a slight chance of rain after 4am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 36. Southwest wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 44. West wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Mostly cloudy, with a low around 26. West wind 6 to 8 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 34.
Friday Night
Partly cloudy, with a low around 10.
Saturday
Partly sunny and cold, with a high near 19.
Saturday Night
A 50 percent chance of snow after 1am. Mostly cloudy, with a low around 11.
Sunday
Snow likely. Cloudy, with a high near 22. Chance of precipitation is 60%.
Sunday Night
Snow likely. Mostly cloudy, with a low around 14. Chance of precipitation is 60%.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 26.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Mostly sunny, with a high near 27.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip Terrace NY
40.75°N 73.18°W (Elev. 30 ft)
40.75°N 73.18°W (Elev. 30 ft)
6:01 pm EST Jan 20, 2026
6pm EST Jan 20, 2026-6pm EST Jan 27, 2026


