S
M
T
W
T
F
S
26
64°
41°
27
68°
45°
28
57°
45°
29
68°
43°
30
N/A
1
59°
50°
2
57°
52°
3
59°
48°
4
59°
48°
5
57°
46°
6
55°
44°
7
56°
47°
8
57°
49°
9
56°
49°
10
56°
48°
11
57°
49°
12
57°
49°
13
56°
50°
14
57°
43°
15
60°
49°
16
60°
49°
17
59°
48°
18
62°
49°
19
59°
49°
20
59°
48°
21
58°
48°
22
59°
46°
23
59°
44°
24
60°
46°
25
59°
45°
26
59°
46°
27
62°
50°
28
60°
51°
29
63°
51°
30
62°
47°
31
59°
45°
1
59°
45°
2
60°
46°
3
60°
46°
4
61°
47°
5
60°
46°
6
60°
46°
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 55° to 63°, with overnight lows between 43° and 52°. The average high for May is 59° with an average low of 48°. 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.
