Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

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

Overcast

76°F

24°C

Humidity 88%
Wind Speed S 5 mph
Barometer 30.08 in (1018.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 14 Jul 1:56 am EDT
Detailed forecast for

Northwest Suffolk

Overnight
Mostly cloudy with a slight chance of showers, thunderstorms with patchy drizzle. Patchy fog. Some thunderstorms may produce heavy rainfall. Near steady temperature in the lower 70s. South winds around 5 mph. Chance of rain 20 percent.
Monday
Patchy fog in the morning. Mostly cloudy with a slight chance of showers, thunderstorms with patchy drizzle in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Some thunderstorms may produce heavy rainfall in the afternoon. Humid with highs in the mid 80s. South winds 5 to 10 mph. Chance of rain 50 percent.
Monday Night
Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 60 percent.
Tuesday
Mostly cloudy with showers likely with a slight chance of thunderstorms in the morning, then partly sunny with a chance of showers with a slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall. Humid with highs in the mid 80s. South winds 5 to 10 mph. Chance of rain 60 percent.
Tuesday Night
Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Humid with lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent.
Wednesday
Partly sunny. Highs in the upper 80s. Heat index values in the upper 90s.
Wednesday Night
Mostly cloudy with a chance of showers. Lows in the mid 70s. Chance of rain 30 percent.
Thursday
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 50 percent. Heat index values up to 100.
Thursday Night
Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. Chance of rain 50 percent.
Friday
Sunny in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 100.
Friday Night
Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 70s. Chance of rain 40 percent.
Saturday
Mostly sunny. Highs in the upper 80s.
Saturday Night
Partly cloudy. Lows in the lower 70s.
Sunday
Partly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 30 percent.



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220 AM EDT Mon Jul 14 2025
 
 

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