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.

Fair

28°F

-2°C

Humidity 49%
Wind Speed N 10 mph
Barometer 30.02 in (1016.6 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 5 Feb 12:56 pm EST
Extended Forecast for

Lake Grove NY

Extreme Cold Watch February 7, 06:00pm until February 8, 01:00pm
Click here for hazard details and duration
Extreme Cold Watch

  • This Afternoon

    This Afternoon: Sunny, with a high near 28. Northwest wind 3 to 6 mph.

    High: 28 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 15. Light north wind.

    Low: 15 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a high near 28. Wind chill values between 15 and 25. North wind around 5 mph becoming calm in the afternoon.

    High: 28 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Snow, mainly after 1am. Low around 16. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 16 °F

    Chance Snow
    then Snow

  • Saturday

    Saturday: Snow, mainly before 1pm. Temperature falling to around 15 by 5pm. Windy, with a northwest wind 6 to 16 mph increasing to 18 to 28 mph. Winds could gust as high as 48 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 23 °F⇓

    Snow and
    Windy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 3. Windy.

    Low: 3 °F

    Decreasing
    Clouds and
    Windy

  • Sunday

    Sunday: Sunny and cold, with a high near 17.

    High: 17 °F

    Cold

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 28. Northwest wind 3 to 6 mph.
Tonight
Increasing clouds, with a low around 15. Light north wind.
Friday
Mostly cloudy, with a high near 28. Wind chill values between 15 and 25. North wind around 5 mph becoming calm in the afternoon.
Friday Night
Snow, mainly after 1am. Low around 16. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Snow, mainly before 1pm. Temperature falling to around 15 by 5pm. Windy, with a northwest wind 6 to 16 mph increasing to 18 to 28 mph. Winds could gust as high as 48 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 3. Windy.
Sunday
Sunny and cold, with a high near 17.
Sunday Night
Mostly clear, with a low around 7.
Monday
Mostly sunny, with a high near 25.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 29.
Tuesday Night
Mostly cloudy, with a low around 18.
Wednesday
A 30 percent chance of rain. Mostly sunny, with a high near 34.
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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:
1:09 pm EST Feb 5, 2026
Forecast Valid:
1pm EST Feb 5, 2026-6pm EST Feb 11, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation