National Weather Service

News Headlines

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain Fog/Mist

57°F

14°C

Humidity	93%
Wind Speed	NE 8 mph
Barometer	30.10 in (1019.2 mb)
Dewpoint	55°F (13°C)
Visibility	2.50 mi
Last update	4 Oct 6:56 pm EDT

More Information:

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

Extended Forecast for

Port Jefferson NY

Tonight
Low: 55 °F
Showers
Likely then
Mostly Cloudy
Monday
High: 67 °F
Mostly Sunny
then Sunny
and Breezy
Monday Night
Low: 45 °F
Clear
Tuesday
High: 60 °F
Sunny
Tuesday Night
Low: 46 °F
Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 56 °F
Mostly Clear
Thursday
High: 70 °F
Sunny
Thursday Night
Low: 56 °F
Mostly Clear

Detailed Forecast

Tonight

Showers likely, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 55. East wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Monday

Sunny, with a high near 67. Breezy, with a northwest wind 7 to 12 mph increasing to 17 to 22 mph in the afternoon.

Monday Night

Clear, with a low around 45. Northwest wind 13 to 17 mph.

Tuesday

Sunny, with a high near 60. Northwest wind 9 to 11 mph.

Tuesday Night

Clear, with a low around 46. West wind around 6 mph becoming calm after midnight.

Wednesday

Sunny, with a high near 64.

Wednesday Night

Mostly clear, with a low around 56.