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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
57°F
14°C
| Humidity | 96% |
| Wind Speed | N 14 mph |
| Barometer | 29.80 in (1009.1 mb) |
| Dewpoint | 56°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 11 Oct 10:56 pm EDT |
Extended Forecast for
Great River NY
Tonight
Low: 56 °F
Rain Likely
and BreezyColumbus Day
High: 70 °F
Chance Rain
then SunnyMonday Night
Low: 57 °F
Mostly Clear
Tuesday
High: 69 °F
Mostly Cloudy
Tuesday Night
Low: 62 °F
Slight Chance
Showers then
Partly CloudyWednesday
High: 75 °F
Mostly Sunny
Wednesday Night
Low: 56 °F
Mostly Cloudy
Thursday
High: 64 °F
Mostly Sunny
Thursday Night
Low: 53 °F
Partly Cloudy
then Chance
Showers
Detailed Forecast
Tonight
Rain and thunderstorms likely before 2am, then rain likely and possibly a thunderstorm between 2am and 5am, then a chance of rain and thunderstorms after 5am. Cloudy, with a low around 56. Breezy, with a northeast wind 17 to 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Columbus Day
A 30 percent chance of rain and thunderstorms before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. Northeast wind 9 to 15 mph.
Monday Night
Mostly clear, with a low around 57. Northwest wind around 6 mph.
Tuesday
Sunny through mid morning, then becoming mostly cloudy, with a high near 69. Light and variable wind becoming south 6 to 11 mph in the morning.
Tuesday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 62. Southwest wind around 16 mph.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 53.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 67. Breezy. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50. Windy.
Saturday
Partly sunny, with a high near 57. Windy.
Saturday Night
Mostly cloudy, with a low around 41. Windy.
Sunday
Mostly sunny, with a high near 54. 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)
3:33 pm EDT Oct 11, 2026
11pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
Additional Resources
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