Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
94°F
34°C
| Humidity | 51% |
| Wind Speed | Vrbl 6 mph |
| Barometer | 29.98 in (1015.0 mb) |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 104°F (40°C) |
| Last update | 2 Jul 10:56 am EDT |
Extended Forecast for
Islip NY
Extreme Heat Warning July 2, 11:14am until July 4, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Today
High: 92 °F⇓
Sunny
Tonight
Low: 77 °F
Clear
Friday
High: 97 °F
Sunny then
Isolated
T-stormsFriday Night
Low: 77 °F
Isolated
T-stormsIndependence Day
High: 95 °F
Sunny then
Chance
T-stormsSaturday Night
Low: 73 °F
Chance
T-stormsSunday
High: 88 °F
Partly Sunny
then Chance
T-stormsSunday Night
Low: 69 °F
Showers
Likely
Detailed Forecast
Today
Sunny, with a temperature falling to around 85 by 5pm. Heat index values as high as 105. Southwest wind 8 to 13 mph.
Tonight
Clear, with a low around 77. Southwest wind 5 to 10 mph becoming light west after midnight.
Friday
Isolated showers and thunderstorms after 2pm. Sunny, with a high near 97. Heat index values as high as 107. Light west wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.
Friday Night
Isolated showers and thunderstorms before 2am. Partly cloudy, with a low around 77. West wind 3 to 6 mph. Chance of precipitation is 20%.
Independence Day
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Light west wind becoming southwest 5 to 10 mph in the morning.
Saturday Night
A 40 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88.
Sunday Night
A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Monday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Tuesday
Partly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 78.
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)
2:58 am EDT Jul 2, 2026
11am EDT Jul 2, 2026-6pm EDT Jul 8, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
