Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast and Breezy

48°F

9°C

Humidity 66%
Wind Speed E 21 G 29 mph
Barometer 30.26 in (1024.8 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 4 Apr 5:56 pm EDT
Extended Forecast for

Lake Grove NY

  • Tonight

    Tonight: A chance of showers between 11pm and 2am, then areas of drizzle with a chance of showers after 2am. The drizzle could be heavy at times.  Areas of dense fog after 2am.  Otherwise, cloudy, with a low around 42. East wind 6 to 16 mph, with gusts as high as 28 mph.  Chance of precipitation is 50%.

    Low: 42 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Sunday

    Sunday: Areas of drizzle with a chance of showers before 11am, then showers, mainly between 11am and 5pm. The drizzle could be heavy at times.  Areas of dense fog before 11am. High near 60. Southwest wind 9 to 15 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers
    Likely and
    Areas Dense
    Fog then
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly before 8pm.  Cloudy during the early evening, then gradual clearing, with a low around 38. Northwest wind around 8 mph.

    Low: 38 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 54. West wind around 10 mph.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain.  Partly cloudy, with a low around 38. West wind 3 to 5 mph.

    Low: 38 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers between 11pm and 2am, then areas of drizzle with a chance of showers after 2am. The drizzle could be heavy at times. Areas of dense fog after 2am. Otherwise, cloudy, with a low around 42. East wind 6 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
Sunday
Areas of drizzle with a chance of showers before 11am, then showers, mainly between 11am and 5pm. The drizzle could be heavy at times. Areas of dense fog before 11am. High near 60. Southwest wind 9 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of showers, mainly before 8pm. Cloudy during the early evening, then gradual clearing, with a low around 38. Northwest wind around 8 mph.
Monday
Sunny, with a high near 54. West wind around 10 mph.
Monday Night
A 20 percent chance of rain. Partly cloudy, with a low around 38. West wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly clear, with a low around 29.
Wednesday
Sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 34.
Thursday
Mostly sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 57.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Lake Grove NY
 40.85°N 73.1°W (Elev. 144 ft)
2:50 pm EDT Apr 4, 2026
6pm EDT Apr 4, 2026-6pm EDT Apr 11, 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