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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
54°F
12°C
| Humidity | 35% |
| Wind Speed | NE 12 mph |
| Barometer | 30.58 in (1035.6 mb) |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 50°F (10°C) |
| Last update | 18 Oct 12:56 pm EDT |
Extended Forecast for
Great River NY
This Afternoon
High: 57 °F
Sunny
Tonight
Low: 46 °F
Mostly Clear
Monday
High: 60 °F
Increasing
CloudsMonday Night
Low: 50 °F
Mostly Cloudy
Tuesday
High: 64 °F
Partly Sunny
and BreezyTuesday Night
Low: 48 °F
Partly Cloudy
and BreezyWednesday
High: 59 °F
Mostly Sunny
and BreezyWednesday Night
Low: 48 °F
Partly Cloudy
and BreezyThursday
High: 62 °F
Partly Sunny
and Breezy
then Mostly
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 57. Northeast wind around 10 mph.
Tonight
Mostly clear, with a low around 46. Northeast wind 6 to 9 mph.
Monday
Increasing clouds, with a high near 60. Northeast wind 13 to 15 mph.
Monday Night
Mostly cloudy, with a low around 50. North wind 13 to 18 mph.
Tuesday
Partly sunny, with a high near 64. Breezy, with a north wind 18 to 21 mph.
Tuesday Night
Partly cloudy, with a low around 48. Breezy.
Wednesday
Mostly sunny, with a high near 59. Breezy.
Wednesday Night
Partly cloudy, with a low around 48. Breezy.
Thursday
Mostly sunny, with a high near 62. Breezy.
Thursday Night
Partly cloudy, with a low around 50. Breezy.
Friday
Mostly sunny, with a high near 59. Breezy.
Friday Night
Partly cloudy, with a low around 49. Breezy.
Saturday
Mostly sunny, with a high near 58. Breezy.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Great River NY
40.7°N 73.17°W (Elev. 7 ft)
40.7°N 73.17°W (Elev. 7 ft)
2:22 am EDT Oct 18, 2026
1pm EDT Oct 18, 2026-6pm EDT Oct 24, 2026
Additional Resources
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Hourly Weather Forecast
