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.

Mostly Cloudy

51°F

11°C

Humidity 96%
Wind Speed W 10 G 18 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 9 Jan 11:56 pm EST
Extended Forecast for

Lake Grove NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Northwest wind 5 to 7 mph.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain after 1pm. High near 45. Calm wind becoming northeast around 6 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 45 °F

    Partly Sunny
    then Rain

  • Saturday Night

    Saturday Night: Rain. Low around 37. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Rain

  • Sunday

    Sunday: A 30 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 44. West wind 7 to 16 mph.

    High: 44 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27. West wind around 15 mph, with gusts as high as 29 mph.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Northwest wind 5 to 7 mph.
Saturday
Rain after 1pm. High near 45. Calm wind becoming northeast around 6 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Low around 37. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 30 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 44. West wind 7 to 16 mph.
Sunday Night
Partly cloudy, with a low around 27. West wind around 15 mph, with gusts as high as 29 mph.
Monday
Sunny, with a high near 40.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Mostly cloudy, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly cloudy, with a high near 39.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 32.
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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:
6:02 pm EST Jan 9, 2026
Forecast Valid:
12am EST Jan 10, 2026-6pm EST Jan 16, 2026
 
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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