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.

Fog/Mist

38°F

3°C

Humidity 89%
Wind Speed W 13 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 35°F (2°C)
Visibility 6.00 mi
Wind Chill30°F (-1°C)
Last update 24 Dec 5:56 am EST
Extended Forecast for

Lake Grove NY

  • Today

    Today: Sunny, with a high near 43. Northwest wind 11 to 16 mph, with gusts as high as 32 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 27. North wind around 6 mph becoming calm in the evening.

    Low: 27 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: A slight chance of rain and snow before 1pm. Mostly cloudy, with a high near 43. Southwest wind 5 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    High: 43 °F

    Slight Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19. Wind chill values between 10 and 15. North wind 8 to 10 mph, with gusts as high as 22 mph.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 29. North wind 6 to 9 mph.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: Snow. Low around 22. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 22 °F

    Snow

  • Saturday

    Saturday: Snow likely before 1pm. Cloudy, with a high near 34. Chance of precipitation is 60%.

    High: 34 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Cloudy, with a high near 43. Chance of precipitation is 60%.

    High: 43 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Today
Sunny, with a high near 43. Northwest wind 11 to 16 mph, with gusts as high as 32 mph.
Tonight
Increasing clouds, with a low around 27. North wind around 6 mph becoming calm in the evening.
Christmas Day
A slight chance of rain and snow before 1pm. Mostly cloudy, with a high near 43. Southwest wind 5 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 19. Wind chill values between 10 and 15. North wind 8 to 10 mph, with gusts as high as 22 mph.
Friday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 29. North wind 6 to 9 mph.
Friday Night
Snow. Low around 22. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Saturday
Snow likely before 1pm. Cloudy, with a high near 34. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Rain likely, mainly after 1pm. Cloudy, with a high near 43. Chance of precipitation is 60%.
Sunday Night
Rain. Low around 28. Chance of precipitation is 80%.
Monday
A 40 percent chance of rain. Partly sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 30.
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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:
1:22 am EST Dec 24, 2025
Forecast Valid:
6am EST Dec 24, 2025-6pm EST Dec 30, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation