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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
81°F
27°C
| Humidity | 67% |
| Wind Speed | Vrbl 5 mph |
| Barometer | 29.81 in (1009.4 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 84°F (29°C) |
| Last update | 23 Aug 12:56 pm EDT |
Extended Forecast for
Islip NY
This Afternoon
High: 80 °F
Chance
ShowersTonight
Low: 65 °F
Mostly Clear
Monday
High: 79 °F
Sunny
Monday Night
Low: 63 °F
Mostly Clear
Tuesday
High: 79 °F
Sunny
Tuesday Night
Low: 62 °F
Mostly Clear
Wednesday
High: 81 °F
Sunny
Wednesday Night
Low: 67 °F
Partly Cloudy
Thursday
High: 80 °F
Mostly Sunny
then Chance
Showers
Detailed Forecast
This Afternoon
A 50 percent chance of showers and thunderstorms before 2pm. Mostly sunny, with a high near 80. South wind around 9 mph.
Tonight
Mostly clear, with a low around 65. West wind 5 to 9 mph.
Monday
Sunny, with a high near 79. Southwest wind 5 to 11 mph.
Monday Night
Mostly clear, with a low around 63. West wind around 7 mph.
Tuesday
Sunny, with a high near 79. West wind 8 to 11 mph.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 80.
Thursday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 82.
Additional Forecasts and Information
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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)
3:21 am EDT Aug 23, 2026
1pm EDT Aug 23, 2026-6pm EDT Aug 29, 2026
Additional Resources
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Hourly Weather Forecast
