Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog
43°F
6°C
| Humidity | 97% |
| Wind Speed | SW 9 mph |
| Barometer | 29.77 in (1008.0 mb) |
| Dewpoint | 42°F (6°C) |
| Visibility | 0.50 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 8 Mar 4:56 am EDT |
Extended Forecast for
Port Jefferson NY
Dense Fog Advisory March 8, 06:12am until March 8, 09:00am
NOW until 9:00am Sun

Dense Fog Advisory
Today

High: 55 °F
Chance
Showers and
Areas Dense
FogTonight

Low: 41 °F
Partly Cloudy
Monday

High: 54 °F
Sunny
Monday Night

Low: 41 °F
Mostly Clear
Tuesday

High: 54 °F
Mostly Sunny
Tuesday Night

Low: 43 °F
Mostly Cloudy
Wednesday

High: 52 °F
Cloudy
Wednesday Night
Low: 47 °F
Breezy.
Cloudy then
Chance
Showers
Detailed Forecast
Today
A 40 percent chance of showers, mainly before 11am. Areas of dense fog before 11am. Otherwise, mostly cloudy, with a high near 55. West wind 10 to 14 mph.
Tonight
Partly cloudy, with a low around 41. West wind around 10 mph.
Monday
Sunny, with a high near 54. Southwest wind 6 to 13 mph.
Monday Night
Mostly clear, with a low around 41. Southwest wind 6 to 10 mph.
Tuesday
Mostly sunny, with a high near 54. South wind 5 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
Cloudy, with a high near 52.
Wednesday Night
A 40 percent chance of showers after 2am. Cloudy, with a low around 47. Breezy.
Thursday
Showers likely, mainly after 8am. Cloudy, with a high near 51. Breezy. Chance of precipitation is 70%.
Thursday Night
Partly cloudy, with a low around 32. Breezy.
Friday
Mostly sunny, with a high near 43.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 39. Breezy.
Saturday
Mostly sunny, with a high near 47. Breezy.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.96°N 73.08°W (Elev. 3 ft)
40.96°N 73.08°W (Elev. 3 ft)
4:09 am EDT Mar 8, 2026
6am EDT Mar 8, 2026-6pm EDT Mar 14, 2026



