National Weather Service

News Headlines

Did you experience recent Tri-State flash flooding events on October 30? Please complete this anonymous short survey to share your experience with NWS New York and researchers.

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy and Breezy

43°F

6°C

Humidity	40%
Wind Speed	NW 21 G 33 mph
Barometer	29.90 in (1012.6 mb)
Dewpoint	20°F (-7°C)
Visibility	10.00 mi
Wind Chill	34°F (1°C)
Last update	17 Nov 7:56 pm EST

More Information:

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

Extended Forecast for

Port Jefferson NYSimilar City Names

Tonight
Low: 36 °F
Partly Cloudy
and Breezy
then Mostly
Clear
Tuesday
High: 46 °F
Mostly Sunny
Tuesday Night
Low: 38 °F
Slight Chance
Rain then
Chance
Rain/Snow
Wednesday
High: 47 °F
Slight Chance
Rain
Wednesday Night
Low: 38 °F
Mostly Cloudy
Thursday
High: 49 °F
Mostly Cloudy
Thursday Night
Low: 44 °F
Cloudy
Friday
High: 56 °F
Chance Rain
Friday Night
Low: 43 °F
Chance Rain

Detailed Forecast

Tonight

Partly cloudy, with a low around 36. Breezy, with a west wind 16 to 21 mph.

Tuesday

Mostly sunny, with a high near 46. West wind 10 to 14 mph.

Tuesday Night

A slight chance of rain before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 38. West wind 5 to 8 mph. Chance of precipitation is 30%.

Wednesday

A 20 percent chance of rain before 1pm. Partly sunny, with a high near 47. North wind 5 to 7 mph.

Wednesday Night

Mostly cloudy, with a low around 38. North wind 5 to 7 mph.

Thursday

Mostly cloudy, with a high near 49.

Thursday Night

Cloudy, with a low around 44.

Friday

A 50 percent chance of rain. Cloudy, with a high near 56.

Friday Night

A 50 percent chance of rain. Mostly cloudy, with a low around 43.