Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79° N Lon: 73.1° W Elev: 98 ft.

Overcast

69°F

21°C

Humidity 51%
Wind Speed NE 7 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 13 Jun 5:56 am EDT
Detailed forecast for

Northwest Suffolk

Today
Mostly cloudy with a slight chance of showers this morning, then partly sunny this afternoon. Highs in the upper 70s. Northeast winds around 5 mph, becoming southeast this afternoon. Chance of rain 20 percent.
Tonight
Mostly cloudy. A slight chance of showers with isolated thunderstorms in the evening, then showers likely with isolated thunderstorms after midnight. Lows around 60. Southeast winds 5 to 10 mph. Chance of rain 70 percent.
Saturday
Showers likely. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.
Saturday Night
Cloudy with a 50 percent chance of showers. Lows in the upper 50s. Northeast winds 5 to 10 mph.
Sunday
Mostly cloudy with a 20 percent chance of showers. Highs in the upper 60s. East winds 5 to 10 mph.
Sunday Night
Cloudy with a 30 percent chance of showers. Lows in the upper 50s.
Monday
Mostly cloudy with a 40 percent chance of showers. Highs around 70.
Monday Night
Mostly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 40 percent.
Tuesday
Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 70s.
Tuesday Night
Mostly cloudy. Lows in the lower 60s.
Wednesday
Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 70s.
Wednesday Night
Mostly cloudy. Lows in the mid 60s.
Juneteenth
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.



Basemap Options
Click map to change the forecast location
Loading map...
346 AM EDT Fri Jun 13 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database