Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
68°F
20°C
| Humidity | 63% |
| Wind Speed | E 9 mph |
| Barometer | 30.18 in (1021.9 mb) |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 18 Aug 7:56 pm EDT |
Extended Forecast for
Great River NY
Tonight
Low: 59 °F
Mostly Clear
Tuesday
High: 74 °F
Mostly Sunny
Tuesday Night
Low: 62 °F
Partly Cloudy
Wednesday
High: 75 °F
Partly Sunny
then Slight
Chance
ShowersWednesday Night
Low: 64 °F
Slight Chance
ShowersThursday
High: 77 °F
Mostly Sunny
Thursday Night
Low: 63 °F
Partly Cloudy
Friday
High: 80 °F
Sunny
Friday Night
Low: 66 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 59. East wind around 10 mph.
Tuesday
Mostly sunny, with a high near 74. East wind 10 to 13 mph.
Tuesday Night
Partly cloudy, with a low around 62. East wind 6 to 8 mph.
Wednesday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 75. East wind 9 to 14 mph.
Wednesday Night
A 20 percent chance of showers before 2am. Partly cloudy, with a low around 64. East wind around 11 mph.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 79.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 67.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 79.
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)
2:53 pm EDT Aug 18, 2025
8pm EDT Aug 18, 2025-6pm EDT Aug 25, 2025
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Hourly Weather Forecast
