Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
62°F
17°C
| Humidity | 62% |
| Wind Speed | E 12 mph |
| Barometer | 30.26 in (1024.6 mb) |
| Dewpoint | 49°F (9°C) |
| Visibility | 10.00 mi |
| Last update | 4 Oct 10:56 am EDT |
Extended Forecast for
Great River NY
Today
High: 64 °F
Showers
Tonight
Low: 56 °F
Showers then
Mostly CloudyMonday
High: 68 °F
Becoming
SunnyMonday Night
Low: 48 °F
Clear
Tuesday
High: 62 °F
Sunny
Tuesday Night
Low: 51 °F
Clear
Wednesday
High: 66 °F
Sunny
Wednesday Night
Low: 57 °F
Mostly Clear
Thursday
High: 69 °F
Sunny
Detailed Forecast
Today
Showers, mainly after 2pm. High near 64. East wind 11 to 14 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers, mainly before 8pm. Low around 56. Northeast wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Partly sunny, then gradually becoming sunny, with a high near 68. West wind 7 to 17 mph.
Monday Night
Clear, with a low around 48. Northwest wind 11 to 14 mph.
Tuesday
Sunny, with a high near 62. West wind around 10 mph.
Tuesday Night
Clear, with a low around 51.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 68.
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:
Great River NY
40.72°N 73.16°W (Elev. 13 ft)
40.72°N 73.16°W (Elev. 13 ft)
10:11 am EDT Oct 4, 2026
11am EDT Oct 4, 2026-6pm EDT Oct 10, 2026
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