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.

A Few Clouds

22°F

-6°C

Humidity 57%
Wind Speed N 12 mph
Barometer 30.11 in (1019.6 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 13 Feb 6:56 am EST
Extended Forecast for

Lake Grove NY

  • Today

    Today: Sunny, with a high near 34. Wind chill values between 10 and 20. Northwest wind 8 to 13 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Scattered snow showers, mainly after 1am. Increasing clouds, with a low around 22. West wind around 5 mph becoming calm. Chance of precipitation is 50%.

    Low: 22 °F

    Slight Chance
    Snow Showers
    then
    Scattered
    Snow Showers

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 39. Wind chill values between 20 and 30. West wind 7 to 11 mph.

    High: 39 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23. West wind around 5 mph becoming calm in the evening.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 36. North wind 5 to 8 mph becoming east in the afternoon.

    High: 36 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 39.

    High: 39 °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 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 34. Wind chill values between 10 and 20. Northwest wind 8 to 13 mph.
Tonight
Scattered snow showers, mainly after 1am. Increasing clouds, with a low around 22. West wind around 5 mph becoming calm. Chance of precipitation is 50%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 39. Wind chill values between 20 and 30. West wind 7 to 11 mph.
Saturday Night
Mostly clear, with a low around 23. West wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 36. North wind 5 to 8 mph becoming east in the afternoon.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 27.
Washington's Birthday
Partly sunny, with a high near 39.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 44.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 33.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 43.
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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:
5:10 am EST Feb 13, 2026
Forecast Valid:
7am EST Feb 13, 2026-6pm EST Feb 19, 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