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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Rain Fog/Mist
60°F
16°C
| Humidity | 93% |
| Wind Speed | E 13 mph |
| Barometer | 30.11 in (1019.7 mb) |
| Dewpoint | 58°F (14°C) |
| Visibility | 5.00 mi |
| Last update | 11 Oct 3:56 pm EDT |
Extended Forecast for
North Great River NY
This Afternoon
High: 61 °F
Rain and
BreezyTonight
Low: 56 °F
Rain and
Breezy then
Rain LikelyColumbus Day
High: 71 °F
Chance Rain
then SunnyMonday Night
Low: 56 °F
Mostly Clear
Tuesday
High: 69 °F
Mostly Cloudy
Tuesday Night
Low: 62 °F
Partly Cloudy
Wednesday
High: 76 °F
Mostly Sunny
Wednesday Night
Low: 55 °F
Mostly Cloudy
Thursday
High: 65 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Rain. Steady temperature around 61. Breezy, with an east wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain and thunderstorms before 2am, then rain likely and possibly a thunderstorm between 2am and 5am, then a chance of rain and thunderstorms after 5am. Low around 56. Breezy, with a northeast wind 18 to 23 mph decreasing to 10 to 15 mph after midnight. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Columbus Day
A 30 percent chance of rain before 8am. Cloudy through mid morning, then gradual clearing, with a high near 71. Northeast wind 8 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 56. Light north wind.
Tuesday
Sunny through mid morning, then becoming mostly cloudy, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Mostly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 51.
Friday
Showers likely. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 48. Breezy.
Saturday
Partly sunny, with a high near 57. Breezy.
Saturday Night
Mostly cloudy, with a low around 40. Breezy.
Sunday
Mostly sunny, with a high near 54.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
North Great River NY
40.74°N 73.16°W (Elev. 7 ft)
40.74°N 73.16°W (Elev. 7 ft)
3:33 pm EDT Oct 11, 2026
4pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
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