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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
56°F
13°C
| Humidity | 37% |
| Wind Speed | NE 6 mph |
| Barometer | 30.54 in (1034.1 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 10.00 mi |
| Last update | 18 Oct 4:56 pm EDT |
Extended Forecast for
Smithtown NY
Tonight
Low: 42 °F
Clear
Monday
High: 62 °F
Mostly Sunny
Monday Night
Low: 46 °F
Mostly Cloudy
Tuesday
High: 64 °F
Partly Sunny
Tuesday Night
Low: 45 °F
Partly Cloudy
Wednesday
High: 60 °F
Mostly Sunny
Wednesday Night
Low: 43 °F
Partly Cloudy
Thursday
High: 63 °F
Mostly Sunny
Thursday Night
Low: 46 °F
Mostly Clear
Detailed Forecast
Tonight
Clear, with a low around 42. Light east wind.
Monday
Mostly sunny, with a high near 62. Northeast wind 8 to 11 mph.
Monday Night
Mostly cloudy, with a low around 46. North wind 8 to 11 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 64. North wind around 15 mph, with gusts as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 45. Northeast wind 11 to 15 mph, with gusts as high as 29 mph.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Mostly sunny, with a high near 60.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Smithtown NY
40.86°N 73.22°W (Elev. 82 ft)
40.86°N 73.22°W (Elev. 82 ft)
5:18 pm EDT Oct 18, 2026
5pm EDT Oct 18, 2026-6pm EDT Oct 25, 2026
Additional Resources
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