Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
72°F
22°C
| Humidity | 82% |
| Wind Speed | Calm |
| Barometer | 30.00 in (1016.0 mb) |
| Dewpoint | 66°F (19°C) |
| Visibility | 10.00 mi |
| Last update | 22 Aug 2:56 pm EDT |
Extended Forecast for
Islandia NY
Tonight
Low: 65 °F
Showers
Likely and
Patchy FogSunday
High: 81 °F
Showers
Likely then
Chance
T-stormsSunday Night
Low: 63 °F
Mostly Clear
Monday
High: 80 °F
Sunny
Monday Night
Low: 61 °F
Mostly Clear
Tuesday
High: 79 °F
Sunny
Tuesday Night
Low: 63 °F
Mostly Clear
Wednesday
High: 81 °F
Sunny
Wednesday Night
Low: 66 °F
Partly Cloudy
Detailed Forecast
Tonight
Patchy drizzle before 11pm, then a slight chance of showers and thunderstorms between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 65. East wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms, mainly between 8am and 5pm. Partly sunny, with a high near 81. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Mostly clear, with a low around 63. West wind 3 to 7 mph.
Monday
Sunny, with a high near 80. Light west wind becoming southwest 6 to 11 mph in the morning.
Monday Night
Mostly clear, with a low around 61. West wind around 6 mph.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 66.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 83.
Additional Forecasts and Information
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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)
2:45 pm EDT Aug 22, 2026
3pm EDT Aug 22, 2026-6pm EDT Aug 29, 2026
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