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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
57°F
14°C
| Humidity | 36% |
| Wind Speed | NE 10 mph |
| Barometer | 30.54 in (1034.2 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 10.00 mi |
| Last update | 18 Oct 3:56 pm EDT |
Extended Forecast for
Mount Sinai NY
Tonight
Low: 43 °F
Clear
Monday
High: 61 °F
Mostly Sunny
Monday Night
Low: 47 °F
Mostly Cloudy
Tuesday
High: 63 °F
Partly Sunny
Tuesday Night
Low: 48 °F
Partly Cloudy
then Mostly
Clear and
BreezyWednesday
High: 59 °F
Mostly Sunny
and Breezy
then Mostly
SunnyWednesday Night
Low: 47 °F
Mostly Cloudy
Thursday
High: 63 °F
Mostly Sunny
Thursday Night
Low: 50 °F
Mostly Clear
Detailed Forecast
Tonight
Clear, with a low around 43. East wind 3 to 5 mph.
Monday
Mostly sunny, with a high near 61. Northeast wind around 11 mph.
Monday Night
Mostly cloudy, with a low around 47. Northeast wind 10 to 15 mph.
Tuesday
Partly sunny, with a high near 63. North wind 14 to 16 mph.
Tuesday Night
Partly cloudy, with a low around 48. Breezy, with a northeast wind 14 to 20 mph.
Wednesday
Mostly sunny, with a high near 59. Breezy.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 58.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 60.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Mount Sinai NY
40.95°N 73.02°W (Elev. 56 ft)
40.95°N 73.02°W (Elev. 56 ft)
2:41 pm EDT Oct 18, 2026
4pm EDT Oct 18, 2026-6pm EDT Oct 25, 2026
Additional Resources
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Hourly Weather Forecast
