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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
44°F
7°C
| Humidity | 51% |
| Wind Speed | N 10 mph |
| Barometer | 30.42 in (1030.1 mb) |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 39°F (4°C) |
| Last update | 18 Oct 12:56 am EDT |
Extended Forecast for
Smithtown NY
Overnight
Low: 39 °F
Clear
Sunday
High: 56 °F
Sunny
Sunday Night
Low: 42 °F
Clear
Monday
High: 62 °F
Increasing
CloudsMonday Night
Low: 45 °F
Mostly Cloudy
Tuesday
High: 64 °F
Partly Sunny
Tuesday Night
Low: 45 °F
Partly Cloudy
Wednesday
High: 59 °F
Mostly Sunny
Wednesday Night
Low: 43 °F
Mostly Cloudy
Detailed Forecast
Overnight
Clear, with a low around 39. North wind around 9 mph.
Sunday
Sunny, with a high near 56. Northeast wind 6 to 8 mph.
Sunday Night
Clear, with a low around 42. Calm wind.
Monday
Increasing clouds, with a high near 62. Northeast wind 8 to 10 mph.
Monday Night
Mostly cloudy, with a low around 45. North wind 8 to 13 mph.
Tuesday
Partly sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Mostly sunny, with a high near 59.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
Partly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 61.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 59.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Smithtown NY
40.86°N 73.19°W (Elev. 98 ft)
40.86°N 73.19°W (Elev. 98 ft)
8:48 pm EDT Oct 17, 2026
1am EDT Oct 18, 2026-6pm EDT Oct 24, 2026
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