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.

Partly Cloudy

29°F

-2°C

Humidity 45%
Wind Speed NW 13 G 23 mph
Barometer 29.84 in (1010.7 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 24 Feb 1:56 pm EST
Extended Forecast for

Lake Grove NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 32. Wind chill values between 15 and 20. West wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 32 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely after 4am. Increasing clouds, with a temperature falling to near 19 by midnight, then rising to around 30 during the remainder of the night. West wind 5 to 7 mph becoming south after midnight. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 19 °F⇑

    Mostly Clear
    then Snow
    Likely

  • Wednesday

    Wednesday: Rain and snow, mainly before 10am. High near 39. Wind chill values between 25 and 30. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    High: 39 °F

    Rain/Snow
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Southwest wind around 6 mph.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 37. West wind around 6 mph.

    High: 37 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 40 percent chance of snow before 4am. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 32. Wind chill values between 15 and 20. West wind 13 to 15 mph, with gusts as high as 25 mph.
Tonight
Snow likely after 4am. Increasing clouds, with a temperature falling to near 19 by midnight, then rising to around 30 during the remainder of the night. West wind 5 to 7 mph becoming south after midnight. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday
Rain and snow, mainly before 10am. High near 39. Wind chill values between 25 and 30. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Wednesday Night
Partly cloudy, with a low around 29. Southwest wind around 6 mph.
Thursday
A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 37. West wind around 6 mph.
Thursday Night
A 40 percent chance of snow before 4am. Mostly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 43.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 19.
Monday
A 40 percent chance of snow. Partly sunny, with a high near 29.
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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:
1:21 pm EST Feb 24, 2026
Forecast Valid:
2pm EST Feb 24, 2026-6pm EST Mar 2, 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