Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Drizzle Fog/Mist
39°F
4°C
| Humidity | 96% |
| Wind Speed | E 12 mph |
| Barometer | 30.24 in (1024.1 mb) |
| Dewpoint | 38°F (3°C) |
| Visibility | 1.50 mi |
| Wind Chill | 32°F (0°C) |
| Last update | 5 Mar 5:56 pm EST |
Extended Forecast for
Port Jefferson NY
Tonight
Low: 36 °F
Rain and
BreezyFriday
High: 40 °F
Chance Rain
then Mostly
CloudyFriday Night
Low: 36 °F
Cloudy then
Slight Chance
Rain and
Patchy FogSaturday
High: 47 °F
Cloudy
Saturday Night
Low: 45 °F⇑
Rain Likely
Sunday
High: 50 °F
Decreasing
CloudsSunday Night
Low: 43 °F
Partly Cloudy
Monday
High: 54 °F
Mostly Sunny
Monday Night
Low: 45 °F
Partly Cloudy
Detailed Forecast
Tonight
Rain, mainly before 4am. Low around 36. Breezy, with a northeast wind 17 to 20 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 30 percent chance of rain, mainly before 7am. Mostly cloudy, with a high near 40. Northeast wind 9 to 16 mph.
Friday Night
A 20 percent chance of rain after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 36. Northeast wind 5 to 7 mph becoming calm after midnight.
Saturday
Cloudy, with a high near 47. Calm wind becoming south 5 to 8 mph in the morning.
Saturday Night
Rain likely. Cloudy, with a temperature rising to around 48 by 4am. South wind 10 to 15 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Cloudy, then gradually becoming mostly sunny, with a steady temperature around 50.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 45.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 54. Breezy.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 43. Breezy. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 48. Breezy.
Additional Forecasts and Information
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Forecast AreaABOUT 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)
1:01 pm EST Mar 5, 2026
7pm EST Mar 5, 2026-6pm EDT Mar 12, 2026
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