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.

A Few Clouds

31°F

-1°C

Humidity 54%
Wind Speed W 18 G 30 mph
Barometer 30.03 in (1017.1 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 19 Jan 9:56 pm EST
Extended Forecast for

Lake Grove NY

  • Tonight

    Tonight: Mostly clear, with a low around 16. Wind chill values between 5 and 15. West wind 11 to 14 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 22. Wind chill values between zero and 10. West wind 11 to 15 mph, with gusts as high as 28 mph.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 12. Wind chill values between 5 and 10. West wind 5 to 9 mph, with gusts as high as 22 mph.

    Low: 12 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 37. Wind chill values between 5 and 15. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 37 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a steady temperature around 35. Southwest wind 8 to 10 mph, with gusts as high as 23 mph.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 16. Wind chill values between 5 and 15. West wind 11 to 14 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 22. Wind chill values between zero and 10. West wind 11 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 12. Wind chill values between 5 and 10. West wind 5 to 9 mph, with gusts as high as 22 mph.
Wednesday
Increasing clouds, with a high near 37. Wind chill values between 5 and 15. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Wednesday Night
Mostly cloudy, with a steady temperature around 35. Southwest wind 8 to 10 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 42.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Partly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 10.
Saturday
Mostly cloudy and cold, with a high near 19.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 8.
Sunday
A 30 percent chance of snow. Mostly cloudy and cold, with a high near 19.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 9.
Monday
Partly sunny, with a high near 23.
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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:
7:14 pm EST Jan 19, 2026
Forecast Valid:
10pm EST Jan 19, 2026-6pm EST Jan 26, 2026
 
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Additional Resources

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