Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
59°F
15°C
| Humidity | 83% |
| Wind Speed | W 5 mph |
| Barometer | 29.94 in (1013.6 mb) |
| Dewpoint | 54°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 17 May 3:56 am EDT |
Extended Forecast for
Smithtown NY
Today
High: 88 °F
Sunny
Tonight
Low: 63 °F
Partly Cloudy
Monday
High: 82 °F
Mostly Sunny
Monday Night
Low: 64 °F
Mostly Clear
Tuesday
High: 86 °F
Sunny
Tuesday Night
Low: 69 °F
Partly Cloudy
Wednesday
High: 87 °F
Sunny then
ShowersWednesday Night
Low: 56 °F
Showers then
Chance
ShowersThursday
High: 75 °F
Partly Sunny
Detailed Forecast
Today
Sunny, with a high near 88. West wind 5 to 11 mph.
Tonight
Partly cloudy, with a low around 63. Southwest wind 5 to 7 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 82. East wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 64. South wind around 6 mph.
Tuesday
Sunny, with a high near 86. Southwest wind 7 to 13 mph.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Showers after 2pm. High near 87. Chance of precipitation is 80%.
Wednesday Night
Showers, mainly before 8pm. Low around 56. Chance of precipitation is 80%.
Thursday
Partly sunny, with a high near 75.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 53.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 70.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Smithtown NY
40.88°N 73.21°W (Elev. 85 ft)
40.88°N 73.21°W (Elev. 85 ft)
2:23 am EDT May 17, 2026
4am EDT May 17, 2026-6pm EDT May 23, 2026
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