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

21°F

-6°C

Humidity 47%
Wind Speed W 10 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 28 Jan 11:56 am EST
Extended Forecast for

Lake Grove NY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 23. Wind chill values between 10 and 15. West wind 6 to 8 mph.

    High: 23 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 10. Wind chill values between 5 and 10. West wind around 6 mph.

    Low: 10 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 21. Wind chill values between zero and 10. West wind 6 to 10 mph.

    High: 21 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 7 °F

    Mostly Clear

  • Friday

    Friday: Sunny and cold, with a high near 18. West wind 8 to 11 mph.

    High: 18 °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 50 percent chance of snow. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow

  • Sunday

    Sunday: A 50 percent chance of snow. Cloudy, with a high near 26. Blustery.

    High: 26 °F

    Chance Snow
    and Blustery

Detailed Forecast

This Afternoon
Partly sunny, 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 10. Wind chill values between 5 and 10. West wind around 6 mph.
Thursday
Mostly sunny, with a high near 21. Wind chill values between zero and 10. West wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 7. Wind chill values between -5 and 5. Northwest wind around 9 mph, with gusts as high as 20 mph.
Friday
Sunny and cold, with a high near 18. West wind 8 to 11 mph.
Friday Night
Mostly clear, with a low around 4.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 14.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 26. 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
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:
12:32 pm EST Jan 28, 2026
Forecast Valid:
12pm 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