Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
31°F
-1°C
| Humidity | 59% |
| Wind Speed | S 8 mph |
| Barometer | 29.61 in (1002.9 mb) |
| Dewpoint | 18°F (-8°C) |
| Visibility | 10.00 mi |
| Wind Chill | 24°F (-4°C) |
| Last update | 6 Feb 4:56 pm EST |
Extended Forecast for
Port Jefferson NY
Wind Advisory February 7, 09:00am until February 8, 12:00am
Extreme Cold Warning February 7, 01:00pm until February 8, 01:00pm
Tonight
Low: 14 °F
Chance Snow
then SnowSaturday
High: 25 °F⇓
Snow and
WindySaturday Night
Low: 4 °F
Gradual
Clearing and
WindySunday
High: 18 °F
Cold
Sunday Night
Low: 7 °F
Mostly Clear
Monday
High: 24 °F
Increasing
CloudsMonday Night
Low: 14 °F
Partly Cloudy
Tuesday
High: 30 °F
Mostly Sunny
Tuesday Night
Low: 20 °F
Mostly Cloudy
Detailed Forecast
Tonight
Snow, mainly after 10pm. Low around 14. East wind around 5 mph becoming calm. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
Saturday
Snow, mainly before 1pm. Temperature falling to around 13 by 5pm. Wind chill values between -10 and zero. Windy, with a northwest wind 11 to 16 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Saturday Night
Cloudy during the early evening, then gradual clearing, with a low around 4. Wind chill values between -10 and -15. Windy, with a northwest wind 20 to 28 mph, with gusts as high as 46 mph.
Sunday
Sunny and cold, with a high near 18. Wind chill values between -5 and -15. Northwest wind 15 to 18 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 7. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.
Monday
Increasing clouds, with a high near 24.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Mostly cloudy, with a low around 20.
Wednesday
A chance of rain and snow after 1pm. Mostly cloudy, with a high near 33. Chance of precipitation is 40%.
Wednesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 23.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 32.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 32.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.93°N 73.06°W (Elev. 161 ft)
40.93°N 73.06°W (Elev. 161 ft)
3:22 pm EST Feb 6, 2026
5pm EST Feb 6, 2026-6pm EST Feb 13, 2026
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