Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
77°F
25°C
| Humidity | 79% |
| Wind Speed | W 15 mph |
| Barometer | 29.96 in (1014.4 mb) |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 79°F (26°C) |
| Last update | 3 Sep 10:56 am EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Today

High: 82 °F
Chance
ShowersTonight

Low: 69 °F
Chance
ShowersFriday
High: 83 °F
Partly Sunny
then Chance
ShowersFriday Night

Low: 64 °F
Partly Cloudy
Saturday

High: 77 °F
Sunny
Saturday Night

Low: 58 °F
Partly Cloudy
Sunday

High: 73 °F
Mostly Sunny
Sunday Night

Low: 58 °F
Mostly Clear
Labor Day

High: 75 °F
Sunny
Detailed Forecast
Today
A slight chance of showers before 2pm, then a chance of showers after 5pm. Partly sunny, with a high near 82. Southwest wind 8 to 10 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms between 11pm and 2am, then a slight chance of showers. Mostly cloudy, with a low around 69. Light southwest wind. Chance of precipitation is 30%.
Friday
A slight chance of showers before 8am, then a chance of showers after 2pm. Partly sunny, with a high near 83. West wind 3 to 7 mph. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 64. North wind 3 to 6 mph.
Saturday
Sunny, with a high near 77. North wind 8 to 10 mph.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 58.
Labor Day
Sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly cloudy, with a low around 62.
Wednesday
Partly sunny, with a high near 76.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.8°N 73.09°W (Elev. 98 ft)
40.8°N 73.09°W (Elev. 98 ft)
5:34 am EDT Sep 3, 2026
11am EDT Sep 3, 2026-6pm EDT Sep 9, 2026


