S
M
T
W
T
F
S
26
59°
39°
27
65°
36°
28
62°
37°
29
61°
44°
30
54°
46°
1
62°
46°
2
56°
45°
3
53°
37°
4
69°
39°
5
72°
56°
6
63°
52°
7
66°
41°
8
62°
43°
9
60°
47°
10
66°
54°
11
67°
47°
12
63°
44°
13
62°
49°
14
64°
51°
15
64°
51°
16
69°
50°
17
68°
48°
18
66°
48°
19
71°
52°
20
67°
52°
21
68°
53°
22
68°
53°
23
69°
50°
24
65°
49°
25
67°
49°
26
67°
54°
27
68°
52°
28
68°
50°
29
69°
49°
30
68°
52°
31
69°
56°
1
73°
55°
2
71°
52°
3
70°
56°
4
74°
57°
5
71°
56°
6
71°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Swansea
Swansea's May 2026 forecast shows daily high temperatures ranging from 60° to 74°, with overnight lows between 41° and 57°. The average high for May is 67° with an average low of 51°. 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 Swansea. See also: June | July | August.
