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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Partly Cloudy
42°F
6°C
| Humidity | 51% |
| Wind Speed | NW 13 mph |
| Barometer | 30.02 in (1016.7 mb) |
| Dewpoint | 25°F (-4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 35°F (2°C) |
| Last update | 3 Dec 12:56 pm EST |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
This Afternoon

High: 43 °F
Sunny
Tonight

Low: 30 °F
Mostly Clear
Thursday

High: 43 °F
Increasing
CloudsThursday Night

Low: 18 °F
Mostly Clear
Friday
High: 35 °F
Mostly Sunny
then Slight
Chance Light
SnowFriday Night
Low: 28 °F
Chance Light
Snow then
Chance
Rain/SnowSaturday

High: 42 °F
Chance Rain
Saturday Night

Low: 30 °F
Partly Cloudy
Sunday

High: 44 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 43. Northwest wind 7 to 10 mph.
Tonight
Mostly clear, with a low around 30. Wind chill values between 25 and 30. West wind 5 to 10 mph.
Thursday
Increasing clouds, with a high near 43. Wind chill values between 25 and 35. West wind 11 to 18 mph, with gusts as high as 32 mph.
Thursday Night
Mostly clear, with a low around 18. Wind chill values between 10 and 15. Northwest wind 7 to 17 mph, with gusts as high as 34 mph.
Friday
A 20 percent chance of light snow after 1pm. Increasing clouds, with a high near 35. North wind 5 to 9 mph becoming south in the afternoon.
Friday Night
A chance of snow before 4am, then a chance of rain. Cloudy, with a low around 28. Chance of precipitation is 30%.
Saturday
A chance of rain or light rain before 7am, then a chance of rain between 7am and 1pm. Partly sunny, with a high near 42. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 25.
Monday
Mostly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 38.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.81°N 73.11°W (Elev. 98 ft)
40.81°N 73.11°W (Elev. 98 ft)
12:40 pm EST Dec 3, 2025
1pm EST Dec 3, 2025-6pm EST Dec 9, 2025


