Hourly Weather Forecast - Port Jefferson, NY

12 AM
30°F
10%
6mph
W
Mostly Clear
Humidity
64%
Feels like
23°F
Dew Point
19°F
1 AM
30°F
10%
6mph
W
Partly Cloudy
Humidity
64%
Feels like
24°F
Dew Point
19°F
2 AM
29°F
10%
5mph
W
Partly Cloudy
Humidity
66%
Feels like
23°F
Dew Point
19°F
3 AM
29°F
10%
5mph
W
Mostly Cloudy
Humidity
68%
Feels like
23°F
Dew Point
19°F
4 AM
28°F
10%
4mph
W
Cloudy
Humidity
70%
Feels like
23°F
Dew Point
20°F
5 AM
28°F
10%
4mph
W
Cloudy
Humidity
71%
Feels like
23°F
Dew Point
20°F
6 AM
28°F
10%
4mph
WSW
Cloudy
Humidity
74%
Feels like
23°F
Dew Point
21°F
7 AM
29°F
10%
4mph
WSW
Cloudy
Humidity
75%
Feels like
24°F
Dew Point
22°F
7:08 AM
8 AM
30°F
10%
4mph
WSW
Cloudy
Humidity
75%
Feels like
26°F
Dew Point
23°F
9 AM
32°F
10%
5mph
WSW
Mostly Cloudy
Humidity
70%
Feels like
27°F
Dew Point
23°F
10 AM
33°F
10%
6mph
WSW
Mostly Cloudy
Humidity
69%
Feels like
28°F
Dew Point
24°F
11 AM
35°F
10%
8mph
WSW
Mostly Cloudy
Humidity
67%
Feels like
28°F
Dew Point
25°F
12 PM
36°F
10%
10mph
WSW
Mostly Cloudy
Humidity
65%
Feels like
28°F
Dew Point
25°F
1 PM
36°F
10%
11mph
WSW
Partly Cloudy
Humidity
62%
Feels like
29°F
Dew Point
25°F
2 PM
36°F
10%
12mph
WSW
Partly Cloudy
Humidity
62%
Feels like
28°F
Dew Point
25°F
3 PM
36°F
10%
12mph
WSW
Partly Cloudy
Humidity
63%
Feels like
28°F
Dew Point
24°F
4 PM
35°F
10%
13mph
W
Mostly Cloudy
Humidity
63%
Feels like
27°F
Dew Point
24°F
4:24 PM
5 PM
35°F
10%
13mph
W
Mostly Cloudy
Humidity
64%
Feels like
26°F
Dew Point
24°F
6 PM
35°F
10%
13mph
W
Partly Cloudy
Humidity
63%
Feels like
26°F
Dew Point
23°F
7 PM
35°F
10%
13mph
W
Partly Cloudy
Humidity
63%
Feels like
26°F
Dew Point
23°F
8 PM
34°F
10%
14mph
W
Mostly Cloudy
Humidity
62%
Feels like
25°F
Dew Point
23°F
9 PM
33°F
10%
14mph
W
Mostly Cloudy
Humidity
64%
Feels like
24°F
Dew Point
22°F
10 PM
32°F
10%
13mph
W
Cloudy
Humidity
64%
Feels like
22°F
Dew Point
21°F
11 PM
31°F
10%
13mph
W
Cloudy
Humidity
63%
Feels like
22°F
Dew Point
20°F

Snow and ice forecast through Friday A.M.

Multiple Snow Threats Across the Northern U.S.

Multiple systems will bring snow across the Northern U.S. through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Unrelenting Rains Soak the Northwest

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide