Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
52°F
11°C
| Humidity | 97% |
| Wind Speed | N 5 mph |
| Barometer | 30.04 in (1017.3 mb) |
| Dewpoint | 51°F (11°C) |
| Visibility | 10.00 mi |
| Wind Chill | 51°F (11°C) |
| Last update | 18 Apr 2:56 am EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Overnight

Low: 50 °F
Partly Cloudy
Saturday

High: 60 °F
Partly Sunny
Saturday Night
Low: 47 °F
Patchy Fog
then Chance
Showers and
Patchy FogSunday

High: 58 °F
Showers
Sunday Night

Low: 38 °F
Gradual
ClearingMonday

High: 52 °F
Mostly Sunny
Monday Night

Low: 33 °F
Mostly Clear
Tuesday

High: 51 °F
Sunny
Tuesday Night

Low: 41 °F
Partly Cloudy
Detailed Forecast
Overnight
Partly cloudy, with a low around 50. Light northeast wind.
Saturday
Partly sunny, with a high near 60. East wind 6 to 10 mph.
Saturday Night
A 30 percent chance of showers, mainly after 5am. Patchy fog after 11pm. Otherwise, cloudy, with a low around 47. Southeast wind 3 to 7 mph.
Sunday
A chance of showers and thunderstorms before 8am, then showers and possibly a thunderstorm between 8am and 2pm, then showers after 2pm. High near 58. South wind 6 to 16 mph becoming northwest in the morning. 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 38. Northwest wind 6 to 9 mph.
Monday
Mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 33.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Partly sunny, with a high near 63.
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)
2:16 am EDT Apr 18, 2026
3am EDT Apr 18, 2026-6pm EDT Apr 24, 2026



