Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
31°F
-1°C
| Humidity | 82% |
| Wind Speed | Calm |
| Barometer | 30.62 in (1037.0 mb) |
| Dewpoint | 26°F (-3°C) |
| Visibility | 10.00 mi |
| Last update | 9 Apr 12:56 am EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Overnight

Low: 32 °F
Frost
Thursday

High: 50 °F
Frost then
SunnyThursday Night

Low: 37 °F
Mostly Clear
Friday

High: 56 °F
Sunny
Friday Night
Low: 45 °F
Partly Cloudy
then Slight
Chance
ShowersSaturday

High: 59 °F
Becoming
SunnySaturday Night

Low: 39 °F
Mostly Clear
Sunday

High: 54 °F
Sunny
Sunday Night

Low: 44 °F
Mostly Cloudy
Detailed Forecast
Overnight
Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 32. Calm wind.
Thursday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 50. Calm wind becoming southeast 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 37. South wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 56. Light southwest wind becoming south 6 to 11 mph in the morning.
Friday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 45. South wind 8 to 10 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 59.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 54.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Mostly cloudy, with a high near 63.
Monday Night
Mostly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 70.
Tuesday Night
Mostly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 70.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.81°N 73.11°W (Elev. 98 ft)
40.81°N 73.11°W (Elev. 98 ft)
5:30 pm EDT Apr 8, 2026
1am EDT Apr 9, 2026-6pm EDT Apr 15, 2026


