


Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
29°C
85°F
Humidity | 61% |
Wind Speed | N 7 km/h |
Barometer | 1015.7 mb (30.00 in) |
Dewpoint | 21°C (70°F) |
Visibility | 16 km |
Heat Index | 32°C (90°F) |
Last update | 9 Jul 11:56 am EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
This Afternoon
High: 31 °C
Mostly Sunny
Tonight
Low: 22 °C
Chance
T-stormsThursday
High: 27 °C
Showers
LikelyThursday Night
Low: 21 °C
Chance
T-stormsFriday
High: 27 °C
Slight Chance
T-stormsFriday Night
Low: 21 °C
Mostly Cloudy
Saturday
High: 28 °C
Partly Sunny
Saturday Night
Low: 21 °C
Partly Cloudy
Sunday
High: 29 °C
Mostly Sunny
Detailed Forecast
This Afternoon
Mostly sunny, with a high near 31. Southwest wind 11 to 13 km/h.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after 11pm. Increasing clouds, with a low around 22. South wind 5 to 10 km/h.
Thursday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 27. South wind 5 to 11 km/h. Chance of precipitation is 70%. New rainfall amounts between 5 and 7.5 mm possible.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 2am. Cloudy, with a low around 21. South wind 3 to 8 km/h.
Friday
A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 27. East wind 5 to 11 km/h becoming southeast in the afternoon. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 28.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 29.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 22.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 30.
Monday Night
Partly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 31.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.78°N 73.09°W (Elev. 49 m)
40.78°N 73.09°W (Elev. 49 m)
8:01 am EDT Jul 9, 2025
12pm EDT Jul 9, 2025-6pm EDT Jul 15, 2025