Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Rain Fog/Mist
57°F
14°C
| Humidity | 90% |
| Wind Speed | N 9 mph |
| Barometer | 30.12 in (1019.9 mb) |
| Dewpoint | 54°F (12°C) |
| Visibility | 2.00 mi |
| Last update | 4 Oct 5:56 pm EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Tonight
Low: 57 °F
Showers then
Mostly CloudyMonday
High: 68 °F
Mostly Sunny
then Sunny
and BreezyMonday Night

Low: 44 °F
Clear
Tuesday

High: 60 °F
Sunny
Tuesday Night

Low: 45 °F
Clear
Wednesday

High: 64 °F
Sunny
Wednesday Night

Low: 56 °F
Mostly Clear
Thursday

High: 70 °F
Sunny
Thursday Night

Low: 55 °F
Mostly Clear
Detailed Forecast
Tonight
Showers, mainly before 8pm. Steady temperature around 57. Northeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Partly sunny, then gradually becoming sunny, with a high near 68. Breezy, with a northwest wind 6 to 11 mph increasing to 18 to 23 mph in the afternoon.
Monday Night
Clear, with a low around 44. Northwest wind 9 to 16 mph.
Tuesday
Sunny, with a high near 60. Northwest wind around 9 mph.
Tuesday Night
Clear, with a low around 45. Light west wind.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 65.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 63.
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)
2:27 pm EDT Oct 4, 2026
6pm EDT Oct 4, 2026-6pm EDT Oct 11, 2026


