Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
52°F
11°C
| Humidity | 93% |
| Wind Speed | SW 6 mph |
| Barometer | 30.11 in (1019.7 mb) |
| Dewpoint | 50°F (10°C) |
| Visibility | 10.00 mi |
| Wind Chill | 50°F (10°C) |
| Last update | 3 Apr 11:56 pm EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Overnight

Low: 50 °F
Patchy Fog
Saturday
High: 64 °F
Patchy Fog
then Slight
Chance
ShowersSaturday Night

Low: 41 °F
Chance
ShowersSunday

High: 59 °F
Showers
Sunday Night

Low: 41 °F
Gradual
ClearingMonday

High: 53 °F
Sunny
Monday Night

Low: 39 °F
Partly Cloudy
Tuesday

High: 50 °F
Mostly Sunny
Tuesday Night

Low: 30 °F
Mostly Clear
Detailed Forecast
Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 50. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of showers after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 64. Light and variable wind becoming east 5 to 10 mph in the afternoon.
Saturday Night
A 40 percent chance of showers, mainly after 8pm. Cloudy, with a low around 41. East wind 6 to 11 mph, with gusts as high as 23 mph.
Sunday
Showers before 11am, then showers and possibly a thunderstorm between 11am and 2pm, then showers after 2pm. High near 59. South wind 10 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Cloudy during the early evening, then gradual clearing, with a low around 41. Northwest wind around 7 mph.
Monday
Sunny, with a high near 53.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly clear, with a low around 30.
Wednesday
Sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Mostly sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 60.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
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)
2:23 pm EDT Apr 3, 2026
12am EDT Apr 4, 2026-6pm EDT Apr 10, 2026


