Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Overcast and Breezy

52°F

11°C

Humidity 57%
Wind Speed N 22 G 38 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 30 May 12:56 pm EDT
Detailed forecast for

Northwest Suffolk

Today
Mostly cloudy with a 20 percent chance of showers. Breezy, cooler with highs around 60. North winds 15 to 25 mph with gusts up to 40 mph.
Tonight
Partly cloudy in the evening, then clearing. Lows in the lower 50s. North winds 15 to 20 mph with gusts up to 30 mph, becoming northwest 5 to 10 mph after midnight.
Sunday
Sunny. Highs in the mid 70s. Northwest winds 5 to 10 mph.
Sunday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s. West winds 5 to 10 mph.
Monday
Mostly sunny. Highs in the mid 70s. Northwest winds around 5 mph, becoming northeast in the afternoon.
Monday Night
Partly cloudy. Lows in the mid 50s.
Tuesday
Mostly sunny. Highs in the mid 70s.
Tuesday Night
Partly cloudy. Lows in the mid 50s.
Wednesday
Mostly sunny. Highs in the mid 70s.
Wednesday Night
Partly cloudy. Lows in the upper 50s.
Thursday
Sunny. Highs in the lower 80s.
Thursday Night
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s.
Friday
Mostly sunny. Highs in the upper 80s.



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1025 AM EDT Sat May 30 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database