Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
85°F
29°C
| Humidity | 70% |
| Wind Speed | SW 10 G 17 mph |
| Barometer | 29.99 in (1015.5 mb) |
| Dewpoint | 74°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 93°F (34°C) |
| Last update | 9 Jul 12:56 pm EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
This Afternoon
High: 84 °F
Mostly Sunny
Tonight
Low: 71 °F
Chance
T-stormsThursday
High: 81 °F
Showers
LikelyThursday Night
Low: 70 °F
Chance
T-stormsFriday
High: 81 °F
Slight Chance
T-stormsFriday Night
Low: 70 °F
Mostly Cloudy
Saturday
High: 83 °F
Partly Sunny
Saturday Night
Low: 70 °F
Partly Cloudy
Sunday
High: 84 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Mostly sunny, with a steady temperature around 84. Southwest wind around 8 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after 11pm. Increasing clouds, with a low around 71. South wind 3 to 6 mph.
Thursday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 81. South wind 3 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 2am. Cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening.
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 81. Light and variable wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 70.
Saturday
Partly sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 87.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.78°N 73.09°W (Elev. 49 ft)
40.78°N 73.09°W (Elev. 49 ft)
8:01 am EDT Jul 9, 2025
1pm EDT Jul 9, 2025-6pm EDT Jul 15, 2025
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