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.

Overcast

54°F

12°C

Humidity 69%
Wind Speed E 14 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 21 May 10:56 am EDT
Extended Forecast for

Lake Grove NY

  • Today

    Today: A 40 percent chance of rain. Cloudy, with a high near 56. East wind 11 to 13 mph.

    High: 56 °F

    Chance Rain

  • Tonight

    Tonight: Rain. Steady temperature around 52. East wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 52 °F

    Rain Likely
    then Rain

  • Thursday

    Thursday: Rain. High near 57. Northeast wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 57 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely before 8pm, then a chance of showers after 8pm. Mostly cloudy, with a low around 46. North wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Rain Likely

  • Friday

    Friday: A 30 percent chance of showers, mainly after 2pm. Cloudy, with a high near 63. Northwest wind 7 to 9 mph becoming west in the afternoon.

    High: 63 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of rain. Cloudy, with a high near 56. East wind 11 to 13 mph.
Tonight
Rain. Steady temperature around 52. East wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Rain. High near 57. Northeast wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Thursday Night
Rain likely before 8pm, then a chance of showers after 8pm. Mostly cloudy, with a low around 46. North wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 30 percent chance of showers, mainly after 2pm. Cloudy, with a high near 63. Northwest wind 7 to 9 mph becoming west in the afternoon.
Friday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 65.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 54.
Memorial Day
A 30 percent chance of showers. Partly sunny, with a high near 71.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 69.
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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:
10:59 am EDT May 21, 2025
Forecast Valid:
11am EDT May 21, 2025-6pm EDT May 27, 2025
 
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