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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 | 91% |
| Wind Speed | SW 5 mph |
| Barometer | 29.80 in (1008.8 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 10.00 mi |
| Last update | 13 Aug 4:56 am EDT |
Extended Forecast for
Islip NY
Overnight

Low: 74 °F
T-storms
LikelyThursday
High: 84 °F
T-storms
Likely then
Slight Chance
ShowersThursday Night

Low: 68 °F
Partly Cloudy
Friday

High: 85 °F
Sunny
Friday Night

Low: 67 °F
Slight Chance
ShowersSaturday

High: 82 °F
Sunny
Saturday Night

Low: 66 °F
Partly Cloudy
Sunday
High: 82 °F
Partly Sunny
then Chance
ShowersSunday Night

Low: 70 °F
Showers
Detailed Forecast
Overnight
Showers and thunderstorms likely. Cloudy, with a steady temperature around 74. West wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely before 11am, then a slight chance of showers after 2pm. Partly sunny, with a high near 84. Northwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Partly cloudy, with a low around 68. North wind 3 to 8 mph.
Friday
Sunny, with a high near 85. North wind 6 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A 20 percent chance of showers before 2am. Partly cloudy, with a low around 67. Southwest wind around 6 mph becoming calm.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
A 40 percent chance of showers after 2pm. Partly sunny, with a high near 82.
Sunday Night
Showers, mainly after 8pm. Low around 70. Chance of precipitation is 80%.
Monday
Showers likely before 8am. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 83.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip NY
40.73°N 73.22°W (Elev. 7 ft)
40.73°N 73.22°W (Elev. 7 ft)
4:30 am EDT Aug 13, 2026
5am EDT Aug 13, 2026-6pm EDT Aug 19, 2026


