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

    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.

    High: 71 °F

    Showers then
    Chance
    Showers

  • Tonight

    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.

    Low: 45 °F

    Showers

  • Saturday

    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%.

    High: 54 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. North wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57. North wind around 8 mph.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 63.

    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.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
North Great River NY
 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
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database