Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
14°F
-10°C
| Humidity | 35% |
| Wind Speed | N 10 mph |
| Barometer | 30.68 in (1039.0 mb) |
| Dewpoint | -9°F (-23°C) |
| Visibility | 10.00 mi |
| Wind Chill | 1°F (-17°C) |
| Last update | 24 Jan 9:56 pm EST |
Extended Forecast for
Port Jefferson NY
Winter Storm Warning January 25, 03:00am until January 26, 06:00pm
Tonight
Low: 15 °F
Mostly Cloudy
then Chance
SnowSunday
High: 32 °F
Heavy Snow
then
Snow/Sleet
and BreezySunday Night
Low: 27 °F
Wintry Mix
and WindyMonday
High: 30 °F⇓
Snow Likely
and BlusteryMonday Night
Low: 16 °F
Partly Cloudy
and WindyTuesday
High: 20 °F
Cold and
BreezyTuesday Night
Low: 14 °F
Partly Cloudy
and BreezyWednesday
High: 23 °F
Sunny
Wednesday Night
Low: 15 °F
Mostly Cloudy
Detailed Forecast
Tonight
A 30 percent chance of snow, mainly after 4am. Cloudy, with a low around 15. Wind chill values between zero and 5. North wind around 10 mph.
Sunday
Snow before 4pm, then snow and sleet. The snow and sleet could be heavy at times. High near 32. Wind chill values between 5 and 10. Breezy, with a northeast wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Chance of precipitation is 100%. New snow and sleet accumulation of 6 to 10 inches possible.
Sunday Night
Snow, freezing rain, and sleet, becoming all snow after 4am. The snow and sleet could be heavy at times. Low around 27. Wind chill values between 10 and 20. Windy, with a northeast wind 27 to 32 mph decreasing to 20 to 25 mph after midnight. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of 1 to 3 inches possible.
Monday
Snow likely, mainly before 1pm. Cloudy, with a temperature falling to around 27 by 5pm. Wind chill values between 15 and 20. Blustery, with a north wind 11 to 20 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
Partly cloudy, with a low around 16. Windy, with a west wind 26 to 29 mph.
Tuesday
Mostly sunny and cold, with a high near 20. Breezy.
Tuesday Night
Partly cloudy, with a low around 14. Breezy.
Wednesday
Sunny, with a high near 23.
Wednesday Night
Mostly cloudy, with a low around 15.
Thursday
Partly sunny, with a high near 22.
Thursday Night
Partly cloudy, with a low around 13. Blustery.
Friday
Mostly sunny, with a high near 23. Blustery.
Friday Night
Partly cloudy, with a low around 16. Blustery.
Saturday
Mostly sunny, with a high near 27.
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)
1:15 pm EST Jan 24, 2026
10pm EST Jan 24, 2026-6pm EST Jan 31, 2026
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