Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
47°F
8°C
| Humidity | 59% |
| Wind Speed | N 8 mph |
| Barometer | 30.20 in (1022.6 mb) |
| Dewpoint | 33°F (1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 43°F (6°C) |
| Last update | 8 Jan 10:56 am EST |
Extended Forecast for
Smithtown NY
Today

High: 46 °F
Sunny
Tonight

Low: 31 °F
Partly Cloudy
Friday
High: 50 °F
Partly Sunny
then Slight
Chance RainFriday Night

Low: 42 °F
Rain Likely
Saturday

High: 49 °F
Rain
Saturday Night

Low: 39 °F
Rain
Sunday

High: 49 °F
Chance
ShowersSunday Night

Low: 28 °F
Partly Cloudy
Monday

High: 40 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 46. Northwest wind around 6 mph becoming calm in the afternoon.
Tonight
Partly cloudy, with a low around 31. Calm wind.
Friday
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 50. Light south wind increasing to 5 to 10 mph in the morning.
Friday Night
Rain likely, mainly between 7pm and 1am. Cloudy, with a low around 42. South wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain. High near 49. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers before 1pm. Cloudy, with a high near 49.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Sunny, with a high near 40.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 45.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Smithtown NY
40.84°N 73.22°W (Elev. 49 ft)
40.84°N 73.22°W (Elev. 49 ft)
5:02 am EST Jan 8, 2026
11am EST Jan 8, 2026-6pm EST Jan 14, 2026


