Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Mostly Cloudy

46°F

8°C

Humidity 86%
Wind Speed S 10 mph
Barometer 30.37 in (1028.4 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 12 Apr 9:56 pm EDT
Detailed forecast for

Northwest Suffolk

Tonight
Mostly cloudy. Lows in the mid 40s. South winds 5 to 10 mph with gusts up to 20 mph.
Monday
Mostly cloudy. Highs in the upper 60s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
Monday Night
Partly cloudy in the evening, then clearing. Lows in the mid 50s. Southwest winds 10 to 15 mph. Gusts up to 25 mph in the evening.
Tuesday
Mostly sunny. Highs in the mid 70s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon.
Tuesday Night
Mostly cloudy with a 20 percent chance of showers. Lows in the upper 50s. Southwest winds 10 to 15 mph.
Wednesday
Mostly sunny. Highs in the mid 70s.
Wednesday Night
Mostly cloudy with a chance of showers. Lows in the mid 50s. Chance of rain 40 percent.
Thursday
Partly sunny. Highs in the lower 70s.
Thursday Night
Mostly cloudy. Lows in the mid 50s.
Friday
Mostly sunny. Highs in the lower 70s.
Friday Night
Partly cloudy. Lows in the lower 50s.
Saturday
Mostly sunny. Highs in the upper 60s.
Saturday Night
Mostly cloudy with a 30 percent chance of showers. Lows in the lower 50s.
Sunday
Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs in the mid 60s. Chance of rain 30 percent.



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703 PM EDT Sun Apr 12 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database