Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

A Few Clouds

24°F

-4°C

Humidity 84%
Wind Speed Calm
Barometer 30.09 in (1018.9 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 27 Feb 6:56 am EST
Detailed forecast for

Northwest Suffolk

Today
Sunny. Highs in the lower 40s. East winds around 5 mph, becoming south around 5 mph this afternoon.
Tonight
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 20s. South winds around 5 mph.
Saturday
Mostly sunny. Highs in the upper 40s. Southwest winds around 5 mph.
Saturday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows around 30. West winds around 5 mph, becoming north after midnight.
Sunday
Mostly cloudy with scattered snow showers in the morning, then partly sunny in the afternoon. Highs in the upper 30s. North winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of snow 50 percent.
Sunday Night
Partly cloudy. Lows 15 to 20.
Monday
Mostly cloudy. Cold with highs in the upper 20s.
Monday Night
Mostly cloudy. Lows around 20.
Tuesday
Partly sunny in the morning, then mostly cloudy with a chance of rain and snow in the afternoon. Highs in the upper 30s. Chance of precipitation 30 percent.
Tuesday Night
Rain likely. Lows around 30. Chance of rain 70 percent.
Wednesday
Mostly cloudy with a chance of rain in the morning, then mostly sunny in the afternoon. Highs in the lower 40s. Chance of rain 30 percent.
Wednesday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 30s.
Thursday
Mostly cloudy. A chance of rain in the afternoon. Highs in the mid 40s. Chance of rain 30 percent.



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1252 AM EST Fri Feb 27 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database