Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Mostly Cloudy

35°F

2°C

Humidity 67%
Wind Speed N 14 mph
Barometer 30.19 in (1022.2 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 24 Mar 12:56 am EDT
Detailed forecast for

Northwest Suffolk

Tonight
Mostly cloudy with a slight chance of rain showers this evening, then partly cloudy after midnight. Lows in the lower 30s. Northwest winds 10 to 15 mph. Chance of rain 20 percent.
Tuesday
Sunny. Highs in the mid 40s. North winds 10 to 15 mph, becoming northwest 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 30s. Southwest winds 5 to 10 mph.
Wednesday
Partly sunny. Highs in the upper 40s. Southwest winds around 5 mph, increasing to 10 to 15 mph in the afternoon.
Wednesday Night
Cloudy. A slight chance of rain after midnight. Lows around 40. South winds 10 to 15 mph. Chance of rain 20 percent.
Thursday
Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 50s.
Thursday Night
Mostly cloudy. A chance of rain in the evening, then rain likely after midnight. Lows in the mid 40s. Chance of rain 70 percent.
Friday
Mostly cloudy with rain likely in the morning, then partly sunny with a chance of rain in the afternoon. Highs in the mid 50s. Chance of rain 70 percent.
Friday Night
Mostly cloudy in the evening, then becoming partly cloudy. Cooler with lows in the upper 20s.
Saturday
Mostly sunny. Highs in the lower 40s.
Saturday Night
Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 30s.
Sunday
Sunny. Highs in the upper 40s.
Sunday Night
Partly cloudy. Lows in the mid 30s.
Monday
Mostly sunny. Highs in the lower 50s.



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512 PM EDT Mon Mar 23 2026
 
 

Additional Resources

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