Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast and Breezy
48°F
9°C
| Humidity | 66% |
| Wind Speed | E 21 G 29 mph |
| Barometer | 30.26 in (1024.8 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 4 Apr 5:56 pm EDT |
Extended Forecast for
Lake Grove NY
Tonight

Low: 42 °F
Chance
Showers and
Areas Dense
FogSunday
High: 60 °F
Showers
Likely and
Areas Dense
Fog then
ShowersSunday Night
Low: 38 °F
Chance
Showers then
Partly CloudyMonday

High: 54 °F
Sunny
Monday Night

Low: 38 °F
Slight Chance
RainTuesday

High: 50 °F
Mostly Sunny
Tuesday Night

Low: 29 °F
Mostly Clear
Wednesday

High: 46 °F
Sunny
Wednesday Night

Low: 34 °F
Mostly Clear
Detailed Forecast
Tonight
A chance of showers between 11pm and 2am, then areas of drizzle with a chance of showers after 2am. The drizzle could be heavy at times. Areas of dense fog after 2am. Otherwise, cloudy, with a low around 42. East wind 6 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
Sunday
Areas of drizzle with a chance of showers before 11am, then showers, mainly between 11am and 5pm. The drizzle could be heavy at times. Areas of dense fog before 11am. High near 60. Southwest wind 9 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of showers, mainly before 8pm. Cloudy during the early evening, then gradual clearing, with a low around 38. Northwest wind around 8 mph.
Monday
Sunny, with a high near 54. West wind around 10 mph.
Monday Night
A 20 percent chance of rain. Partly cloudy, with a low around 38. West wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly clear, with a low around 29.
Wednesday
Sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 34.
Thursday
Mostly sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 57.
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)
2:50 pm EDT Apr 4, 2026
6pm EDT Apr 4, 2026-6pm EDT Apr 11, 2026


