Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Mostly Cloudy

72°F

22°C

Humidity 71%
Wind Speed S 7 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 25 May 5:56 pm EDT
Detailed forecast for

Southwest Suffolk

Tonight
Mostly cloudy. Lows in the upper 50s. Southwest winds around 5 mph, becoming northwest after midnight.
Tuesday
Partly sunny. Highs in the upper 70s. Northeast winds around 5 mph, becoming south in the afternoon.
Tuesday Night
Mostly cloudy. Lows in the upper 50s. Southwest winds 5 to 10 mph.
Wednesday
Mostly cloudy in the morning, then becoming partly sunny. Highs around 80. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon.
Wednesday Night
Mostly cloudy with a slight chance of showers with isolated thunderstorms. Lows in the lower 60s. West winds 5 to 10 mph, becoming northwest after midnight. Chance of rain 20 percent.
Thursday
Mostly sunny. Highs in the upper 70s.
Thursday Night
Partly cloudy. Lows in the mid 50s.
Friday
Sunny. Highs in the lower 70s.
Friday Night
Partly cloudy. Lows in the mid 50s.
Saturday
Mostly sunny. Highs around 70.
Saturday Night
Partly cloudy. Lows in the mid 50s.
Sunday
Mostly sunny. Highs in the upper 60s.
Sunday Night
Partly cloudy. Lows in the mid 50s.
Monday
Sunny. Highs in the lower 70s.



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315 PM EDT Mon May 25 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database