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

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

35°F

2°C

Humidity 89%
Wind Speed W 6 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 8 Jan 5:56 am EST
Extended Forecast for

Lake Grove NY

  • Today

    Today: Sunny, with a high near 45. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 45 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 49. Light south wind increasing to 5 to 10 mph in the morning.

    High: 49 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: Rain likely, mainly between 7pm and 1am. Cloudy, with a steady temperature around 46. South wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Rain Likely

  • Saturday

    Saturday: Rain. Steady temperature around 46. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 46 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Sunday

    Sunday: A 40 percent chance of showers. Cloudy, with a high near 48.

    High: 48 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 45. Northwest wind around 6 mph becoming calm in the afternoon.
Tonight
Partly cloudy, with a low around 31. Calm wind.
Friday
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 49. Light south wind increasing to 5 to 10 mph in the morning.
Friday Night
Rain likely, mainly between 7pm and 1am. Cloudy, with a steady temperature around 46. South wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain. Steady temperature around 46. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers. Cloudy, with a high near 48.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 42.
Tuesday Night
Partly cloudy, with a low around 33.
Wednesday
Mostly cloudy, with a high near 45.
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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:
5:02 am EST Jan 8, 2026
Forecast Valid:
6am EST Jan 8, 2026-6pm EST Jan 14, 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