Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
30°F
-1°C
| Humidity | 39% |
| Wind Speed | W 15 G 21 mph |
| Barometer | 29.85 in (1011.0 mb) |
| Dewpoint | 8°F (-13°C) |
| Visibility | 10.00 mi |
| Wind Chill | 19°F (-7°C) |
| Last update | 24 Feb 3:56 pm EST |
Extended Forecast for
Islandia NY
Tonight
Low: 20 °F⇑
Mostly Clear
then Snow
LikelyWednesday
High: 39 °F
Rain/Snow
then Chance
Rain/SnowWednesday Night
Low: 29 °F
Partly Cloudy
Thursday
High: 37 °F
Mostly Sunny
then Chance
SnowThursday Night
Low: 25 °F
Chance Snow
Friday
High: 37 °F
Mostly Sunny
Friday Night
Low: 27 °F
Partly Cloudy
Saturday
High: 43 °F
Mostly Sunny
Saturday Night
Low: 29 °F
Partly Cloudy
Detailed Forecast
Tonight
Snow likely after 4am. Increasing clouds, with a temperature falling to near 20 by 11pm, then rising to around 32 during the remainder of the night. Wind chill values between 15 and 20. West wind 5 to 8 mph becoming south after midnight. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Wednesday
Snow, possibly mixed with rain, mainly before 10am. High near 39. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Wednesday Night
Partly cloudy, with a low around 29. West wind around 6 mph.
Thursday
A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 37. Wind chill values between 25 and 35. West wind 3 to 6 mph.
Thursday Night
A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 25. Light and variable wind.
Friday
Mostly sunny, with a high near 37.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 43.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 20.
Monday
A 40 percent chance of snow. Partly sunny, with a high near 29.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 20.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Islandia NY
40.81°N 73.17°W (Elev. 161 ft)
40.81°N 73.17°W (Elev. 161 ft)
1:21 pm EST Feb 24, 2026
4pm EST Feb 24, 2026-6pm EST Mar 3, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
