Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

A Few Clouds

50°F

10°C

Humidity 46%
Wind Speed W 15 mph
Barometer 29.82 in (1009.8 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 1 Nov 7:56 am EDT
Detailed forecast for

Northwest Suffolk

Today
Sunny. Highs in the upper 50s. West winds 15 to 20 mph with gusts up to 30 mph.
Tonight
Partly cloudy in the evening, then clearing. Lows in the lower 40s. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the evening.
Sunday
Sunny. Highs in the upper 50s. Northwest winds 5 to 10 mph.
Sunday Night
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. Southwest winds around 5 mph.
Monday
Partly sunny with a slight chance of rain in the morning, then mostly cloudy with a chance of rain in the afternoon. Highs in the upper 50s. Southwest winds 5 to 10 mph. Chance of rain 40 percent.
Monday Night
Mostly cloudy in the evening, then becoming partly cloudy. A 50 percent chance of rain. Lows in the mid 40s.
Tuesday
Sunny. Highs in the upper 50s.
Tuesday Night
Mostly clear. Lows in the mid 40s.
Wednesday
Mostly sunny. Highs in the upper 50s.
Wednesday Night
Mostly cloudy with a 40 percent chance of rain. Lows in the mid 40s.
Thursday
Partly sunny. A chance of rain in the morning. Highs in the upper 50s. Chance of rain 40 percent.
Thursday Night
Partly cloudy. Lows around 40.
Friday
Mostly sunny. Highs in the mid 50s.



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603 AM EDT Sat Nov 1 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database