Hourly Weather Forecast - Port Jefferson, NY

12 AM
28°F
0%
20mph
WNW
Windy
Humidity
53%
Feels like
15°F
Dew Point
13°F
1 AM
28°F
0%
20mph
W
Windy
Humidity
52%
Feels like
14°F
Dew Point
13°F
2 AM
27°F
0%
20mph
W
Windy
Humidity
54%
Feels like
14°F
Dew Point
13°F
3 AM
27°F
0%
20mph
W
Windy
Humidity
54%
Feels like
13°F
Dew Point
13°F
4 AM
26°F
0%
20mph
W
Clear
Humidity
56%
Feels like
12°F
Dew Point
13°F
5 AM
26°F
0%
19mph
W
Clear
Humidity
57%
Feels like
12°F
Dew Point
12°F
6 AM
25°F
0%
18mph
W
Clear
Humidity
58%
Feels like
12°F
Dew Point
13°F
7 AM
26°F
0%
17mph
W
Clear
Humidity
59%
Feels like
13°F
Dew Point
14°F
7:07 AM
8 AM
27°F
0%
16mph
W
Sunny
Humidity
58%
Feels like
15°F
Dew Point
14°F
9 AM
28°F
0%
16mph
W
Sunny
Humidity
54%
Feels like
16°F
Dew Point
14°F
10 AM
29°F
0%
16mph
W
Sunny
Humidity
53%
Feels like
18°F
Dew Point
14°F
11 AM
31°F
0%
16mph
W
Sunny
Humidity
50%
Feels like
19°F
Dew Point
15°F
12 PM
32°F
0%
16mph
W
Sunny
Humidity
49%
Feels like
21°F
Dew Point
15°F
1 PM
32°F
0%
15mph
W
Sunny
Humidity
47%
Feels like
22°F
Dew Point
15°F
2 PM
32°F
0%
15mph
W
Mostly Sunny
Humidity
47%
Feels like
22°F
Dew Point
15°F
3 PM
32°F
0%
14mph
W
Mostly Sunny
Humidity
48%
Feels like
22°F
Dew Point
15°F
4 PM
31°F
0%
13mph
W
Mostly Sunny
Humidity
49%
Feels like
22°F
Dew Point
15°F
4:24 PM
5 PM
31°F
0%
11mph
W
Mostly Clear
Humidity
51%
Feels like
21°F
Dew Point
15°F
6 PM
31°F
0%
11mph
W
Mostly Clear
Humidity
52%
Feels like
22°F
Dew Point
15°F
7 PM
31°F
0%
10mph
W
Mostly Clear
Humidity
54%
Feels like
22°F
Dew Point
16°F
8 PM
31°F
0%
9mph
W
Mostly Clear
Humidity
56%
Feels like
23°F
Dew Point
17°F
9 PM
30°F
10%
8mph
W
Mostly Clear
Humidity
58%
Feels like
23°F
Dew Point
17°F
10 PM
30°F
10%
8mph
W
Mostly Clear
Humidity
60%
Feels like
23°F
Dew Point
18°F
11 PM
30°F
10%
7mph
W
Mostly Clear
Humidity
61%
Feels like
23°F
Dew Point
18°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

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Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide