Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
47°F
8°C
| Humidity | 52% |
| Wind Speed | W 7 mph |
| Barometer | 29.91 in (1012.9 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 44°F (7°C) |
| Last update | 14 Nov 7:56 pm EST |
Extended Forecast for
Great River NY
Tonight
Low: 34 °F
Mostly Cloudy
then FrostSaturday
High: 56 °F
Frost then
Partly SunnySaturday Night
Low: 49 °F
Showers
Sunday
High: 58 °F⇓
Breezy.
Slight Chance
Showers then
Mostly SunnySunday Night
Low: 35 °F
Partly Cloudy
and BreezyMonday
High: 47 °F
Mostly Sunny
and BreezyMonday Night
Low: 35 °F
Mostly Clear
Tuesday
High: 47 °F
Mostly Sunny
Tuesday Night
Low: 35 °F
Partly Cloudy
Detailed Forecast
Tonight
Widespread frost, mainly after 5am. Otherwise, partly cloudy, with a low around 34. North wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday
Widespread frost before 8am. Otherwise, increasing clouds, with a high near 56. North wind 6 to 10 mph becoming southwest in the afternoon.
Saturday Night
Showers, mainly before 1am. Low around 49. Southwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 20 percent chance of showers before 10am. Cloudy through mid morning, then gradual clearing, with a temperature rising to near 58 by 10am, then falling to around 49 during the remainder of the day. Breezy, with a west wind 15 to 21 mph, with gusts as high as 36 mph.
Sunday Night
Partly cloudy, with a low around 35. Breezy, with a west wind 18 to 21 mph, with gusts as high as 38 mph.
Monday
Mostly sunny, with a high near 47. Breezy.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Partly sunny, with a high near 52.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 54.
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)
3:12 pm EST Nov 14, 2025
8pm EST Nov 14, 2025-6pm EST Nov 21, 2025
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