Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog/Mist
43°F
6°C
| Humidity | 100% |
| Wind Speed | Calm |
| Barometer | 29.95 in (1014.1 mb) |
| Dewpoint | 43°F (6°C) |
| Visibility | 3.00 mi |
| Last update | 23 Apr 6:56 am EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Today
High: 73 °F
Patchy Fog
then SunnyTonight

Low: 46 °F
Increasing
CloudsFriday

High: 61 °F
Decreasing
CloudsFriday Night
Low: 42 °F
Partly Cloudy
then Slight
Chance RainSaturday

High: 51 °F
Rain Likely
Saturday Night

Low: 41 °F
Rain Likely
Sunday
High: 56 °F
Chance Rain
then Partly
SunnySunday Night

Low: 44 °F
Partly Cloudy
Monday

High: 60 °F
Mostly Sunny
Detailed Forecast
Today
Patchy fog before 8am. Otherwise, sunny, with a high near 73. Light northwest wind increasing to 5 to 10 mph in the morning.
Tonight
Increasing clouds, with a low around 46. North wind 3 to 5 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 61. Northeast wind around 6 mph becoming west in the afternoon.
Friday Night
A 20 percent chance of rain after 2am. Partly cloudy, with a low around 42. Calm wind.
Saturday
Rain likely, mainly after 2pm. Mostly cloudy, with a high near 51. East wind 6 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain likely, mainly before 2am. Cloudy, with a low around 41. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 30 percent chance of rain before 8am. Partly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
Showers likely. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 58.
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)
5:06 am EDT Apr 23, 2026
7am EDT Apr 23, 2026-6pm EDT Apr 29, 2026


