National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain

50°F

10°C

Humidity 77%
Wind Speed E 14 G 28 mph
Barometer 30.28 in (1025.2 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 2 Apr 12:56 am EDT
Extended Forecast for

Lake Grove NY

  • Overnight

    Overnight: Showers. Low around 41. East wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Showers

  • Thursday

    Thursday: Showers likely, mainly before 11am. Cloudy, with a high near 46. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 46 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 8pm. Cloudy, with a low around 39. East wind 5 to 9 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 59. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 59 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers. High near 59. Chance of precipitation is 80%.

    High: 59 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 39. Chance of precipitation is 80%.

    Low: 39 °F

    Showers then
    Chance
    Showers

Detailed Forecast

Overnight
Showers. Low around 41. East wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers likely, mainly before 11am. Cloudy, with a high near 46. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers after 8pm. Cloudy, with a low around 39. East wind 5 to 9 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 59. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 50. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Showers. High near 59. Chance of precipitation is 80%.
Sunday Night
Showers, mainly before 8pm. Low around 39. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Sunny, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Grove NY
 40.85°N 73.1°W (Elev. 144 ft)
Last Update:
9:10 pm EDT Apr 1, 2026
Forecast Valid:
1am EDT Apr 2, 2026-6pm EDT Apr 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation