Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Rain
63°F
17°C
| Humidity | 87% |
| Wind Speed | S 7 mph |
| Barometer | 29.95 in (1014.3 mb) |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 16 Oct 6:56 am EDT |
Extended Forecast for
North Great River NY
Today
High: 71 °F
Showers then
Chance
ShowersTonight

Low: 45 °F
Showers
Saturday
High: 54 °F
Showers
Likely then
Mostly SunnySaturday Night

Low: 39 °F
Mostly Clear
Sunday

High: 57 °F
Sunny
Sunday Night

Low: 43 °F
Mostly Clear
Monday

High: 60 °F
Mostly Sunny
Monday Night

Low: 46 °F
Mostly Cloudy
Tuesday

High: 63 °F
Partly Sunny
Detailed Forecast
Today
Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 71. Southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 2am, then showers likely. Low around 45. Southwest wind 7 to 11 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 54. North wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 39. North wind 9 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 57. North wind around 8 mph.
Sunday Night
Mostly clear, with a low around 43.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 46.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 60.
Additional Forecasts and Information
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ABOUT 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)
3:47 am EDT Oct 16, 2026
7am EDT Oct 16, 2026-6pm EDT Oct 22, 2026



