Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
67°F
19°C
| Humidity | 59% |
| Wind Speed | SE 9 mph |
| Barometer | 30.25 in (1024.3 mb) |
| Dewpoint | 52°F (11°C) |
| Visibility | 10.00 mi |
| Last update | 3 Oct 5:56 pm EDT |
Extended Forecast for
Mount Sinai NY
Tonight
Low: 54 °F
Mostly Clear
Sunday
High: 62 °F
Partly Sunny
then Chance
ShowersSunday Night
Low: 56 °F
Chance
ShowersMonday
High: 67 °F
Becoming
SunnyMonday Night
Low: 49 °F
Clear
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 48 °F
Clear
Wednesday
High: 63 °F
Sunny
Wednesday Night
Low: 54 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 54. East wind 5 to 7 mph.
Sunday
A 50 percent chance of showers after 2pm. Increasing clouds, with a high near 62. East wind 9 to 11 mph.
Sunday Night
A 30 percent chance of showers, mainly before 11pm. Cloudy, with a low around 56. East wind around 6 mph becoming calm in the evening.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 67. Northwest wind 5 to 15 mph.
Monday Night
Clear, with a low around 49. Northwest wind 11 to 14 mph.
Tuesday
Sunny, with a high near 59.
Tuesday Night
Clear, with a low around 48.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 67.
Friday Night
Partly cloudy, with a low around 55.
Saturday
Mostly sunny, with a high near 65.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Mount Sinai NY
40.93°N 73.03°W (Elev. 151 ft)
40.93°N 73.03°W (Elev. 151 ft)
2:19 pm EDT Oct 3, 2026
6pm EDT Oct 3, 2026-6pm EDT Oct 10, 2026
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