Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Light Rain Fog/Mist

36°F

2°C

Humidity 93%
Wind Speed E 7 mph
Barometer 29.87 in (1011.6 mb)
Dewpoint 34°F (1°C)
Visibility 6.00 mi
Wind Chill30°F (-1°C)
Last update 20 Feb 8:56 am EST
Detailed forecast for

Northwest Suffolk

Today
Rain. Highs in the upper 30s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100 percent.
Tonight
Mostly cloudy. A chance of rain in the evening. Lows in the lower 30s. Northeast winds 5 to 10 mph, becoming northwest after midnight. Chance of rain 50 percent.
Saturday
Partly sunny. Highs in the lower 40s. Northwest winds 5 to 10 mph.
Saturday Night
Cloudy. A slight chance of rain and snow in the evening, then a slight chance of snow after midnight. Lows around 30. East winds 5 to 10 mph. Chance of precipitation 20 percent.
Sunday
Cloudy with a 50 percent chance of snow. Highs in the upper 30s. East winds 15 to 20 mph.
Sunday Night
Snow likely. Moderate snow accumulation possible. Breezy with lows in the upper 20s. Chance of snow 70 percent.
Monday
Cloudy. A chance of snow in the morning. Breezy with highs in the mid 30s. Chance of snow 40 percent.
Monday Night
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 20s.
Tuesday
Mostly sunny. Highs in the mid 30s.
Tuesday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 20s.
Wednesday
Mostly cloudy. Highs around 40.
Wednesday Night
Cloudy. A chance of rain in the evening, then rain likely after midnight. Lows in the lower 30s. Chance of rain 60 percent.
Thursday
Mostly cloudy with a 40 percent chance of rain. Highs in the mid 40s.



Basemap Options
Click map to change the forecast location
Loading map...
103 AM EST Fri Feb 20 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database