National Weather Service

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

23°C

73°F

Humidity	90%
Wind Speed	SW 9 km/h
Barometer	998.5 mb (29.49 in)
Dewpoint	21°C (70°F)
Visibility	14 km
Last update	6 Jun 5:56 pm EDT

More Information:

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

Extended Forecast for

Smithtown NY

Tonight
Low: 18 °C
Showers
Likely then
Mostly Cloudy
Friday
High: 28 °C
Mostly Sunny
Friday Night
Low: 16 °C
Decreasing
Clouds
Saturday
High: 27 °C
Sunny
Saturday Night
Low: 17 °C
Mostly Clear
then Slight
Chance
Showers
Sunday
High: 26 °C
Chance
Showers
Sunday Night
Low: 16 °C
Partly Cloudy
Monday
High: 25 °C
Mostly Sunny
Monday Night
Low: 14 °C
Partly Cloudy

Detailed Forecast

Tonight

Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 18. Southwest wind 5 to 13 km/h becoming northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

Friday

Mostly sunny, with a high near 28. Northwest wind 5 to 10 km/h becoming southwest 11 to 16 km/h in the afternoon.

Friday Night

Mostly cloudy, then gradually becoming clear, with a low around 16. West wind around 14 km/h.

Saturday

Sunny, with a high near 27. West wind 14 to 21 km/h.

Saturday Night

A 20 percent chance of showers after 2am. Partly cloudy, with a low around 17. Southwest wind 10 to 13 km/h.

Sunday

A 30 percent chance of showers after 8am. Partly sunny, with a high near 26.

Sunday Night

Partly cloudy, with a low around 16.