


Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
76°F
24°C
Humidity | 82% |
Wind Speed | S 7 mph |
Barometer | 29.99 in (1015.3 mb) |
Dewpoint | 70°F (21°C) |
Visibility | 10.00 mi |
Heat Index | 77°F (25°C) |
Last update | 19 Jul 11:56 pm EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Overnight
Low: 74 °F
Chance
T-storms and
Patchy FogSunday
High: 88 °F
Chance
T-storms and
Patchy FogSunday Night
Low: 72 °F
Chance
T-storms then
Mostly ClearMonday
High: 85 °F
Sunny
Monday Night
Low: 66 °F
Mostly Clear
Tuesday
High: 81 °F
Sunny
Tuesday Night
Low: 67 °F
Mostly Clear
Wednesday
High: 86 °F
Sunny
Wednesday Night
Low: 71 °F
Partly Cloudy
Detailed Forecast
Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 74. South wind around 8 mph.
Sunday
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 88. Southwest wind 6 to 11 mph. Chance of precipitation is 40%.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Northwest wind around 9 mph.
Monday
Sunny, with a high near 85. North wind around 10 mph.
Monday Night
Mostly clear, with a low around 66. Northeast wind around 10 mph.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 75.
Friday
Mostly sunny, with a high near 90.
Friday Night
Mostly cloudy, with a low around 76.
Saturday
Mostly sunny, with a high near 90.
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)
3:09 pm EDT Jul 19, 2025
12am EDT Jul 20, 2025-6pm EDT Jul 26, 2025