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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
30°F
-1°C
| Humidity | 49% |
| Wind Speed | S 8 mph |
| Barometer | 30.11 in (1019.9 mb) |
| Dewpoint | 13°F (-11°C) |
| Visibility | 10.00 mi |
| Wind Chill | 22°F (-6°C) |
| Last update | 9 Dec 2:56 pm EST |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Tonight
Low: 30 °F⇑
Mostly Cloudy
Wednesday
High: 49 °F
Partly Sunny
then Rain
Likely and
BreezyWednesday Night
Low: 30 °F
Chance Rain
Thursday
High: 38 °F
Mostly Sunny
Thursday Night
Low: 25 °F
Partly Cloudy
Friday
High: 37 °F
Mostly Sunny
Friday Night
Low: 26 °F
Mostly Cloudy
then Chance
Light SnowSaturday
High: 42 °F
Mostly Cloudy
Saturday Night
Low: 29 °F
Mostly Cloudy
then Chance
Snow
Detailed Forecast
Tonight
Mostly cloudy, with a temperature rising to around 36 by midnight. Wind chill values between 20 and 25. Southwest wind 8 to 11 mph, with gusts as high as 24 mph.
Wednesday
Rain likely after 1pm. Mostly cloudy, with a high near 49. Wind chill values between 25 and 35 early. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
A 50 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 30. Southwest wind 11 to 15 mph, with gusts as high as 31 mph.
Thursday
Mostly sunny, with a high near 38. Wind chill values between 20 and 25. West wind 15 to 17 mph, with gusts as high as 34 mph.
Thursday Night
Partly cloudy, with a low around 25. West wind 11 to 17 mph, with gusts as high as 34 mph.
Friday
Mostly sunny, with a high near 37.
Friday Night
A 30 percent chance of light snow after 1am. Mostly cloudy, with a low around 26.
Saturday
Mostly cloudy, with a high near 42.
Saturday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29.
Sunday
A chance of snow before 9am, then a chance of rain between 9am and 1pm. Partly sunny, with a high near 39. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Mostly sunny, with a high near 35.
Additional Forecasts and Information
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Forecast AreaABOUT 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)
1:17 pm EST Dec 9, 2025
3pm EST Dec 9, 2025-6pm EST Dec 16, 2025
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