S
M
T
W
T
F
S
29
68°
43°
30
65°
44°
1
63°
45°
2
64°
44°
3
65°
44°
4
64°
45°
5
65°
46°
6
64°
45°
7
65°
43°
8
64°
49°
9
63°
49°
10
64°
50°
11
68°
50°
12
69°
49°
13
69°
49°
14
68°
50°
15
69°
50°
16
70°
49°
17
69°
46°
18
63°
43°
19
62°
50°
20
63°
49°
21
64°
49°
22
62°
46°
23
63°
50°
24
62°
48°
25
64°
44°
26
63°
45°
27
65°
45°
28
64°
44°
29
62°
42°
30
63°
46°
31
63°
47°
1
Hist. Avg.
67°
46°
2
Hist. Avg.
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Seal Beach
Seal Beach's December 2026 forecast shows daily high temperatures ranging from 62° to 70°, with overnight lows between 42° and 50°. The average high for December is 65° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Seal Beach. See also: January | February | March.
