Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
21°F
-6°C
| Humidity | 36% |
| Wind Speed | W 15 mph |
| Barometer | 30.30 in (1026.2 mb) |
| Dewpoint | -2°F (-19°C) |
| Visibility | 10.00 mi |
| Wind Chill | 7°F (-14°C) |
| Last update | 20 Jan 3:56 pm EST |
Extended Forecast for
Lake Grove NY
Tonight

Low: 11 °F
Mostly Clear
Wednesday

High: 38 °F
Increasing
CloudsWednesday Night

Low: 35 °F
Slight Chance
Rain/SnowThursday

High: 43 °F
Mostly Sunny
Thursday Night

Low: 24 °F
Mostly Cloudy
Friday

High: 33 °F
Partly Sunny
Friday Night

Low: 9 °F
Partly Cloudy
Saturday

High: 18 °F
Cold
Saturday Night
Low: 10 °F
Mostly Cloudy
then Chance
Snow
Detailed Forecast
Tonight
Mostly clear, with a low around 11. Wind chill values between 5 and 10. West wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Increasing clouds, with a high near 38. Wind chill values between 5 and 15. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Wednesday Night
A slight chance of rain and snow before 1am, then a slight chance of snow between 1am and 4am, then a slight chance of rain after 4am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 35. Southwest wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 43. West wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Mostly cloudy, with a low around 24. West wind 6 to 8 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 9.
Saturday
Partly sunny and cold, with a high near 18.
Saturday Night
A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 10.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 22.
Sunday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 13.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 25.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Mostly sunny, with a high near 26.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Lake Grove NY
40.85°N 73.1°W (Elev. 144 ft)
40.85°N 73.1°W (Elev. 144 ft)
3:33 pm EST Jan 20, 2026
4pm EST Jan 20, 2026-6pm EST Jan 27, 2026


