Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
19°F
-7°C
| Humidity | 49% |
| Wind Speed | NW 20 G 30 mph |
| Barometer | 29.76 in (1007.8 mb) |
| Dewpoint | 3°F (-16°C) |
| Visibility | 10.00 mi |
| Wind Chill | 3°F (-16°C) |
| Last update | 1 Feb 6:56 pm EST |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Tonight

Low: 12 °F
Decreasing
CloudsMonday

High: 29 °F
Sunny
Monday Night

Low: 13 °F
Mostly Clear
Tuesday

High: 31 °F
Sunny
Tuesday Night

Low: 19 °F
Mostly Cloudy
Wednesday

High: 31 °F
Partly Sunny
Wednesday Night

Low: 13 °F
Partly Cloudy
Thursday

High: 28 °F
Mostly Sunny
Thursday Night

Low: 13 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 12. Wind chill values between zero and 5. Northwest wind 10 to 14 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 29. Wind chill values between zero and 10. Northwest wind 9 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 13. Light northwest wind.
Tuesday
Sunny, with a high near 31. Wind chill values between 15 and 25. Calm wind becoming west 5 to 7 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 19. Calm wind.
Wednesday
Partly sunny, with a high near 31.
Wednesday Night
Partly cloudy, with a low around 13.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 13.
Friday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 31.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 12.
Saturday
Mostly sunny and cold, with a high near 20.
Saturday Night
Partly cloudy, with a low around 5.
Sunday
Mostly sunny and cold, with a high near 19.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.78°N 73.09°W (Elev. 49 ft)
40.78°N 73.09°W (Elev. 49 ft)
6:39 pm EST Feb 1, 2026
7pm EST Feb 1, 2026-6pm EST Feb 8, 2026


