Hourly Weather Forecast - Port Jefferson, NY

12 AM
37°F
0%
9mph
SSW
Clear
Humidity
76%
Feels like
31°F
Dew Point
31°F
1 AM
38°F
0%
8mph
SSW
Mostly Clear
Humidity
76%
Feels like
31°F
Dew Point
31°F
2 AM
37°F
0%
8mph
SSW
Mostly Clear
Humidity
77%
Feels like
31°F
Dew Point
31°F
3 AM
37°F
0%
8mph
SW
Mostly Clear
Humidity
76%
Feels like
31°F
Dew Point
30°F
4 AM
37°F
0%
7mph
SW
Partly Cloudy
Humidity
75%
Feels like
31°F
Dew Point
29°F
5 AM
37°F
0%
7mph
SW
Partly Cloudy
Humidity
74%
Feels like
31°F
Dew Point
29°F
6 AM
37°F
0%
6mph
SW
Partly Cloudy
Humidity
74%
Feels like
32°F
Dew Point
29°F
6:47 AM
7 AM
38°F
0%
6mph
SW
Partly Cloudy
Humidity
73%
Feels like
33°F
Dew Point
30°F
8 AM
40°F
0%
6mph
SW
Partly Cloudy
Humidity
71%
Feels like
35°F
Dew Point
31°F
9 AM
42°F
0%
6mph
SW
Partly Cloudy
Humidity
67%
Feels like
38°F
Dew Point
32°F
10 AM
44°F
0%
7mph
SW
Partly Cloudy
Humidity
64%
Feels like
40°F
Dew Point
33°F
11 AM
46°F
0%
7mph
SW
Mostly Cloudy
Humidity
61%
Feels like
42°F
Dew Point
33°F
12 PM
47°F
0%
8mph
SW
Mostly Cloudy
Humidity
60%
Feels like
43°F
Dew Point
34°F
1 PM
48°F
0%
9mph
SW
Cloudy
Humidity
59%
Feels like
44°F
Dew Point
35°F
2 PM
48°F
10%
9mph
SW
Cloudy
Humidity
60%
Feels like
44°F
Dew Point
35°F
3 PM
49°F
10%
10mph
SSW
Cloudy
Humidity
61%
Feels like
44°F
Dew Point
36°F
4 PM
48°F
10%
10mph
SSW
Cloudy
Humidity
62%
Feels like
44°F
Dew Point
36°F
5 PM
47°F
10%
10mph
SSW
Cloudy
Humidity
65%
Feels like
43°F
Dew Point
36°F
6 PM
46°F
10%
9mph
SSW
Cloudy
Humidity
69%
Feels like
41°F
Dew Point
36°F
7 PM
45°F
10%
9mph
SSW
Cloudy
Humidity
72%
Feels like
40°F
Dew Point
37°F
7:09 PM
8 PM
44°F
10%
9mph
SSW
Cloudy
Humidity
75%
Feels like
39°F
Dew Point
37°F
9 PM
44°F
20%
8mph
SSW
Cloudy
Humidity
78%
Feels like
39°F
Dew Point
37°F
10 PM
44°F
30%
7mph
SSW
30% Chance of Light Rain
Humidity
79%
Feels like
40°F
Dew Point
38°F
11 PM
44°F
30%
6mph
SSW
30% Chance of Light Rain
Humidity
80%
Feels like
40°F
Dew Point
38°F

Sunday's High Temperature Outlook

Early Spring Heat Wave Zaps Southwest

Much of the Southwest will observe record-breaking heat through the weekend, with high temperatures reminiscent of mid-summer!

Weekend Weather Outlook

Today's Weather Outlook

Weekly Drought Map for March 19, 2026

Active Weather, Drought Improvements for Eastern Half; Drying Persists Elsewhere

(Image provided by Pixabay.com)

Lightning Safety

A tree knocked over after a storm produced high winds. (provided by PublicDomainPictures via Pixabay.com)

Strong Winds in the Springtime

Story image: WeatherBug user Pat S. captures a plant blooming in Columbia, Md., on February 24, 2017.

When Does Spring Begin?

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide