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

14°F

-10°C

Humidity 47%
Wind Speed W 17 G 30 mph
Barometer 30.10 in (1019.3 mb)
Dewpoint -3°F (-19°C)
Visibility 10.00 mi
Wind Chill-2°F (-19°C)
Last update 30 Jan 1:56 am EST
Extended Forecast for

Lake Grove NY

Cold Weather Advisory January 30, 02:38am until January 31, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 30, 02:38am until January 31, 10:00am

    NOW until 10:00am Sat

    Cold Weather Advisory

  • Overnight

    Low: 8 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and cold, with a high near 19. Wind chill values between -5 and 5. West wind 14 to 16 mph.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 4. Wind chill values between -5 and zero. Northwest wind 5 to 9 mph.

    Low: 4 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 21. Wind chill values between -5 and 5. North wind 5 to 8 mph.

    High: 21 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 11. North wind 7 to 16 mph, with gusts as high as 26 mph.

    Low: 11 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 30 percent chance of snow. Cloudy, with a high near 24. Blustery.

    High: 24 °F

    Chance Snow
    and Blustery

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 8. Wind chill values between -5 and zero. Northwest wind around 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny and cold, with a high near 19. Wind chill values between -5 and 5. West wind 14 to 16 mph.
Friday Night
Partly cloudy, with a low around 4. Wind chill values between -5 and zero. Northwest wind 5 to 9 mph.
Saturday
Partly sunny, with a high near 21. Wind chill values between -5 and 5. North wind 5 to 8 mph.
Saturday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 11. North wind 7 to 16 mph, with gusts as high as 26 mph.
Sunday
A 30 percent chance of snow. Cloudy, with a high near 24. Blustery.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 32.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 30.
Wednesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 18.
Thursday
Partly sunny, with a high near 30.
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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:
1:47 am EST Jan 30, 2026
Forecast Valid:
2am EST Jan 30, 2026-6pm EST Feb 5, 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