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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 Index	76°F (24°C)
Last update	14 Jul 1:56 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

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.