Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
65°F
18°C
| Humidity | 84% |
| Wind Speed | N 8 mph |
| Barometer | 29.91 in (1012.9 mb) |
| Dewpoint | 60°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 24 Jun 6:56 am EDT |
Extended Forecast for
Smithtown NY
Today
High: 83 °F
Sunny
Tonight
Low: 63 °F
Mostly Clear
Thursday
High: 81 °F
Mostly Sunny
Thursday Night
Low: 66 °F
Slight Chance
T-storms then
Showers
LikelyFriday
High: 80 °F
Showers
Likely then
Slight Chance
ShowersFriday Night
Low: 66 °F
Chance
Showers then
Showers
LikelySaturday
High: 80 °F
Showers
LikelySaturday Night
Low: 66 °F
Partly Cloudy
Sunday
High: 84 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 83. Northwest wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 63. West wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 81. Calm wind becoming south 5 to 9 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 66. South wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely and possibly a thunderstorm before 8am, then a slight chance of showers. Partly sunny, with a high near 80. Southwest wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 67.
Monday
Sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Mostly sunny, with a high near 85.
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)
7:00 am EDT Jun 24, 2026
7am EDT Jun 24, 2026-6pm EDT Jun 30, 2026
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