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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
49°F
9°C
| Humidity | 46% |
| Wind Speed | NE 10 mph |
| Barometer | 29.95 in (1014.4 mb) |
| Dewpoint | 29°F (-2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 45°F (7°C) |
| Last update | 21 Mar 6:56 pm EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Tonight

Low: 39 °F
Mostly Cloudy
Sunday

High: 55 °F
Chance
ShowersSunday Night

Low: 39 °F
Showers
Monday

High: 46 °F
Chance Rain
Monday Night

Low: 30 °F
Mostly Clear
Tuesday

High: 45 °F
Sunny
Tuesday Night

Low: 34 °F
Increasing
CloudsWednesday

High: 50 °F
Partly Sunny
Wednesday Night

Low: 35 °F
Mostly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, with a low around 39. North wind 5 to 9 mph becoming calm in the evening.
Sunday
A slight chance of showers before 11am, then a chance of showers after 5pm. Mostly cloudy, with a high near 55. South wind 7 to 11 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 9pm, then rain after 9pm. Low around 39. Southwest wind around 5 mph becoming light and variable. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 40 percent chance of rain before 2pm. Cloudy, with a high near 46. North wind 8 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 30. North wind around 7 mph.
Tuesday
Sunny, with a high near 45.
Tuesday Night
Increasing clouds, with a low around 34.
Wednesday
Partly sunny, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
A chance of rain between 8am and 2pm. Mostly cloudy, with a high near 51. Chance of precipitation is 30%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.
Friday
Rain likely. Mostly sunny, with a high near 49. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 43.
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)
3:03 pm EDT Mar 21, 2026
7pm EDT Mar 21, 2026-6pm EDT Mar 28, 2026


