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.

A Few Clouds

20°F

-7°C

Humidity 50%
Wind Speed W 12 mph
Barometer 30.12 in (1020.1 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 28 Jan 10:56 am EST
Extended Forecast for

Lake Grove NY

  • Today

    Today: Increasing clouds, with a high near 23. Wind chill values between 10 and 15. West wind 6 to 8 mph.

    High: 23 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 8. Wind chill values between zero and 5. West wind 6 to 8 mph.

    Low: 8 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 21. Wind chill values between zero and 10. Northwest wind 8 to 11 mph.

    High: 21 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 8. Wind chill values between zero and 5. West wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 8 °F

    Mostly Clear

  • Friday

    Friday: Sunny and cold, with a high near 19. West wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around 4.

    Low: 4 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A 50 percent chance of snow. Cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

Detailed Forecast

Today
Increasing clouds, with a high near 23. Wind chill values between 10 and 15. West wind 6 to 8 mph.
Tonight
Mostly cloudy, with a low around 8. Wind chill values between zero and 5. West wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 21. Wind chill values between zero and 10. Northwest wind 8 to 11 mph.
Thursday Night
Mostly clear, with a low around 8. Wind chill values between zero and 5. West wind 7 to 9 mph, with gusts as high as 20 mph.
Friday
Sunny and cold, with a high near 19. West wind 7 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 4.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 14.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 27.
Sunday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 31.
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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:
1:25 am EST Jan 28, 2026
Forecast Valid:
11am EST Jan 28, 2026-6pm EST Feb 3, 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