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.

Partly Cloudy

17°F

-8°C

Humidity 47%
Wind Speed NW 12 mph
Barometer 29.92 in (1013.3 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 2 Feb 5:56 am EST
Extended Forecast for

Lake Grove NY

  • Today

    Today: Sunny, with a high near 29. Wind chill values between zero and 10. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 29 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 13. Light northwest wind.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31. Wind chill values between 15 and 25. Calm wind becoming west 5 to 7 mph in the morning.

    High: 31 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 31. Calm wind becoming northwest 5 to 8 mph in the morning.

    High: 31 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 30.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

Today
Sunny, with a high near 29. Wind chill values between zero and 10. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 13. Light northwest wind.
Tuesday
Mostly sunny, with a high near 31. Wind chill values between 15 and 25. Calm wind becoming west 5 to 7 mph in the morning.
Tuesday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 22. Calm wind.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 31. Calm wind becoming northwest 5 to 8 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 13.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 12.
Friday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 30.
Friday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 8.
Saturday
Mostly sunny and cold, with a high near 17. Blustery.
Saturday Night
Partly cloudy, with a low around 4. Blustery.
Sunday
Mostly sunny and cold, with a high near 19.
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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:
12:53 am EST Feb 2, 2026
Forecast Valid:
6am EST Feb 2, 2026-6pm EST Feb 8, 2026
 
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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

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation