S
M
T
W
T
F
S
26
69°
55°
27
71°
52°
28
74°
51°
29
73°
52°
30
73°
58°
1
70°
59°
2
67°
58°
3
69°
61°
4
68°
57°
5
69°
60°
6
72°
59°
7
74°
60°
8
73°
59°
9
71°
60°
10
71°
61°
11
74°
59°
12
75°
60°
13
75°
61°
14
72°
57°
15
66°
53°
16
67°
54°
17
68°
55°
18
67°
54°
19
68°
54°
20
68°
55°
21
75°
59°
22
75°
61°
23
74°
60°
24
74°
59°
25
75°
60°
26
74°
61°
27
75°
59°
28
73°
58°
29
73°
56°
30
68°
55°
31
68°
55°
1
69°
56°
2
71°
57°
3
73°
59°
4
75°
59°
5
73°
61°
6
72°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seal Beach
Seal Beach's May 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 53° and 61°. The average high for May is 71° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Seal Beach. See also: June | July | August.
