Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
74°F
23°C
| Humidity | 85% |
| Wind Speed | SE 5 mph |
| Barometer | 29.96 in (1014.6 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 10.00 mi |
| Last update | 27 Aug 6:56 pm EDT |
Extended Forecast for
North Great River NY
Tonight
Low: 70 °F
Showers
Likely then
Slight Chance
T-stormsFriday
High: 82 °F
Chance
ShowersFriday Night
Low: 66 °F
Slight Chance
T-storms then
Mostly CloudySaturday
High: 81 °F
Mostly Sunny
Saturday Night
Low: 65 °F
Mostly Clear
Sunday
High: 82 °F
Sunny
Sunday Night
Low: 69 °F
Partly Cloudy
Monday
High: 84 °F
Mostly Sunny
then Chance
T-stormsMonday Night
Low: 70 °F
Chance
T-storms then
Mostly Cloudy
Detailed Forecast
Tonight
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 70. South wind 6 to 10 mph. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers and thunderstorms after 11am. Partly sunny, with a high near 82. Southwest wind 3 to 7 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 66. Calm wind becoming north 5 to 7 mph after midnight.
Saturday
Mostly sunny, with a high near 81. North wind 5 to 7 mph becoming light and variable in the afternoon.
Saturday Night
Mostly clear, with a low around 65. Light south wind.
Sunday
Sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 69.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 70.
Tuesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 83.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 69.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 82.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 68.
Thursday
Partly sunny, with a high near 81.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
North Great River NY
40.77°N 73.18°W (Elev. 49 ft)
40.77°N 73.18°W (Elev. 49 ft)
5:53 pm EDT Aug 27, 2026
7pm EDT Aug 27, 2026-6pm EDT Sep 3, 2026
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