Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Mostly Cloudy

81°F

27°C

Humidity 37%
Wind Speed NW 10 mph
Barometer 30.04 in (1017.1 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jul 10:56 am EDT
Detailed forecast for

Northwest Suffolk

Today
Mostly sunny. Areas of smoke late this morning, then patchy smoke this afternoon. Highs in the mid 80s. Northwest winds 5 to 10 mph.
Tonight
Partly cloudy. Areas of smoke. Lows in the lower 70s. Southwest winds around 5 mph.
Saturday
Partly sunny with a chance of showers in the morning, then cloudy with showers with a chance of thunderstorms in the afternoon. Areas of smoke. Humid with highs in the lower 80s. South winds 15 to 20 mph. Gusts up to 30 mph in the afternoon. Chance of rain 80 percent.
Saturday Night
Showers with a chance of thunderstorms. Humid with lows in the lower 70s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 90 percent.
Sunday
Sunny. A slight chance of showers in the morning. Highs in the lower 80s. Northwest winds 10 to 15 mph. Chance of rain 20 percent.
Sunday Night
Mostly clear. Lows in the mid 60s.
Monday
Sunny. Highs in the lower 80s.
Monday Night
Partly cloudy. Lows in the upper 60s.
Tuesday
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.
Tuesday Night
Showers with a chance of thunderstorms. Lows in the lower 70s. Chance of rain 80 percent.
Wednesday
Partly sunny. Showers likely, mainly in the morning. Highs in the upper 80s. Chance of rain 70 percent.
Wednesday Night
Partly cloudy in the evening, then clearing. Lows in the upper 60s.
Thursday
Sunny. Highs in the lower 80s.



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952 AM EDT Fri Jul 17 2026
 
 

Additional Resources

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