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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
75°F
24°C
| Humidity | 88% |
| Wind Speed | Calm |
| Barometer | 29.88 in (1011.7 mb) |
| Dewpoint | 71°F (22°C) |
| Visibility | 10.00 mi |
| Last update | 18 Aug 9:56 am EDT |
Extended Forecast for
Islip NYSimilar City Names
Today

High: 84 °F
Partly Sunny
Tonight

Low: 68 °F
Partly Cloudy
Wednesday

High: 86 °F
Sunny
Wednesday Night

Low: 71 °F
Partly Cloudy
Thursday
High: 83 °F
Mostly Sunny
then Chance
ShowersThursday Night

Low: 66 °F
Showers
LikelyFriday

High: 81 °F
Chance
ShowersFriday Night
Low: 66 °F
Mostly Cloudy
then Chance
ShowersSaturday

High: 80 °F
Chance
Showers
Detailed Forecast
Today
Partly sunny, with a high near 84. Light and variable wind becoming southwest around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around 68. Light and variable wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 71. Southwest wind 3 to 7 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Thursday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A 30 percent chance of showers before 2pm. Partly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 66.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 80.
Saturday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Sunday
A 50 percent chance of showers. Partly sunny, with a high near 81.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 81.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip NYSimilar City Names
40.73°N 73.22°W (Elev. 7 ft)
40.73°N 73.22°W (Elev. 7 ft)
5:37 am EDT Aug 18, 2026
10am EDT Aug 18, 2026-6pm EDT Aug 24, 2026


