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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

78°F

26°C

Humidity	82%
Wind Speed	Calm
Barometer	29.96 in (1014.6 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	1 Sep 4:56 pm EDT

More Information:

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

Extended Forecast for

Smithtown NY

Tonight
Low: 64 °F
Showers then
Mostly Cloudy
Wednesday
High: 74 °F
Mostly Cloudy
Wednesday Night
Low: 64 °F
Mostly Cloudy
then Showers
Likely
Thursday
High: 80 °F
Showers
Likely
Thursday Night
Low: 68 °F
Showers
Likely
Friday
High: 82 °F
Mostly Sunny
Friday Night
Low: 63 °F
Partly Cloudy
Saturday
High: 77 °F
Sunny
Saturday Night
Low: 60 °F
Partly Cloudy

Detailed Forecast

Tonight

Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Low around 64. Southwest wind 5 to 8 mph becoming northeast in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

Mostly cloudy, with a high near 74. East wind around 9 mph.

Wednesday Night

A chance of showers and thunderstorms between 2am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 64. East wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

Showers likely and possibly a thunderstorm before 2pm, then showers likely between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 80. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 68. Southwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Mostly sunny, with a high near 82.

Friday Night

Partly cloudy, with a low around 63.

Saturday

Sunny, with a high near 77.

Saturday Night

Partly cloudy, with a low around 60.

Sunday

Mostly sunny, with a high near 74.

Sunday Night

Mostly clear, with a low around 59.