Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
59°F
15°C
| Humidity | 81% |
| Wind Speed | Calm |
| Barometer | 29.95 in (1014.2 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 17 May 4:56 am EDT |
Extended Forecast for
Islip NY
Today
High: 80 °F
Sunny
Tonight
Low: 60 °F
Partly Cloudy
Monday
High: 75 °F
Mostly Sunny
Monday Night
Low: 60 °F
Partly Cloudy
Tuesday
High: 78 °F
Sunny
Tuesday Night
Low: 64 °F
Partly Cloudy
Wednesday
High: 81 °F
Sunny then
Showers
LikelyWednesday Night
Low: 55 °F
Showers
LikelyThursday
High: 69 °F
Partly Sunny
Detailed Forecast
Today
Sunny, with a high near 80. Southwest wind 5 to 13 mph.
Tonight
Partly cloudy, with a low around 60. Southwest wind 5 to 8 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 75. Light east wind becoming southeast 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 60. Southwest wind 5 to 7 mph.
Tuesday
Sunny, with a high near 78. Southwest wind 7 to 13 mph.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Showers likely after 2pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 81. Chance of precipitation is 70%.
Wednesday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 51.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 65.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Islip NY
40.73°N 73.22°W (Elev. 7 ft)
40.73°N 73.22°W (Elev. 7 ft)
5:34 am EDT May 17, 2026
5am EDT May 17, 2026-6pm EDT May 23, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
