S
M
T
W
T
F
S
26
80°
53°
27
83°
62°
28
66°
54°
29
67°
48°
30
66°
41°
1
64°
43°
2
62°
44°
3
75°
42°
4
78°
57°
5
69°
47°
6
63°
43°
7
67°
48°
8
71°
52°
9
77°
58°
10
68°
44°
11
67°
50°
12
73°
52°
13
75°
56°
14
78°
59°
15
78°
55°
16
73°
54°
17
74°
55°
18
76°
57°
19
80°
56°
20
71°
52°
21
72°
53°
22
71°
53°
23
73°
54°
24
74°
57°
25
75°
57°
26
75°
55°
27
76°
56°
28
76°
55°
29
77°
55°
30
80°
60°
31
81°
60°
1
82°
64°
2
81°
62°
3
84°
64°
4
85°
65°
5
85°
66°
6
84°
65°
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 63° to 85°, with overnight lows between 43° and 66°. The average high for May is 76° with an average low of 56°. 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.
