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.

Mostly Cloudy

28°F

-2°C

Humidity 63%
Wind Speed SW 6 mph
Barometer 30.12 in (1020.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 13 Feb 7:56 pm EST
Extended Forecast for

Lake Grove NY

  • Tonight

    Tonight: A 20 percent chance of snow showers after 4am. Mostly cloudy, with a low around 22. Light west wind.

    Low: 22 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 39. Wind chill values between 20 and 30. West wind 6 to 11 mph.

    High: 39 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23. Calm wind.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 35. Wind chill values between 25 and 30. Calm wind becoming northeast around 5 mph.

    High: 35 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of snow showers after 4am. Mostly cloudy, with a low around 22. Light west wind.
Saturday
Mostly sunny, with a high near 39. Wind chill values between 20 and 30. West wind 6 to 11 mph.
Saturday Night
Mostly clear, with a low around 23. Calm wind.
Sunday
Partly sunny, with a high near 35. Wind chill values between 25 and 30. Calm wind becoming northeast around 5 mph.
Sunday Night
A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 26. Calm wind.
Washington's Birthday
Partly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 40 percent chance of rain after 1pm. Cloudy, with a high near 42.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 30%.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Grove NY
 40.85°N 73.1°W (Elev. 144 ft)
Last Update:
1:16 pm EST Feb 13, 2026
Forecast Valid:
8pm EST Feb 13, 2026-6pm EST Feb 20, 2026
 
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Additional Resources

Radar & Satellite Image

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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