Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
43°F
6°C
| Humidity | 63% |
| Wind Speed | S 14 mph |
| Barometer | 29.89 in |
| Dewpoint | 31°F (-1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 36°F (2°C) |
| Last update | 13 Jan 4:56 pm EST |
Extended Forecast for
Islip Terrace NY
Tonight
Low: 39 °F
Mostly Cloudy
then Slight
Chance RainWednesday
High: 46 °F
Slight Chance
Rain then
Mostly CloudyWednesday Night
Low: 29 °F
Slight Chance
Rain then
Chance RainThursday

High: 36 °F⇓
Decreasing
CloudsThursday Night

Low: 17 °F
Partly Cloudy
Friday

High: 35 °F
Mostly Sunny
Friday Night

Low: 28 °F
Mostly Cloudy
Saturday

High: 42 °F
Partly Sunny
Saturday Night

Low: 26 °F
Mostly Cloudy
Detailed Forecast
Tonight
A 20 percent chance of rain after 4am. Mostly cloudy, with a low around 39. Southwest wind 8 to 10 mph, with gusts as high as 23 mph.
Wednesday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 46. Southwest wind 6 to 9 mph.
Wednesday Night
A 50 percent chance of rain, mainly after 1am. Cloudy, with a low around 29. Calm wind becoming southwest around 6 mph after midnight.
Thursday
Cloudy, then gradually becoming mostly sunny, with a temperature rising to near 36 by 10am, then falling to around 28 during the remainder of the day. Wind chill values between 20 and 30. West wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Partly cloudy, with a low around 17. Northwest wind around 10 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 35.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
Partly sunny, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
Partly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 20.
M.L.King Day
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 28.
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)
12:35 pm EST Jan 13, 2026
5pm EST Jan 13, 2026-6pm EST Jan 20, 2026


