S
M
T
W
T
F
S
26
76°
57°
27
78°
56°
28
84°
56°
29
89°
62°
30
93°
63°
1
93°
68°
2
96°
67°
3
96°
68°
4
80°
65°
5
79°
59°
6
88°
60°
7
99°
67°
8
103°
73°
9
105°
78°
10
107°
75°
11
109°
75°
12
107°
82°
13
100°
75°
14
99°
76°
15
100°
77°
16
96°
73°
17
92°
70°
18
83°
67°
19
86°
66°
20
94°
65°
21
97°
66°
22
98°
73°
23
97°
74°
24
98°
77°
25
99°
78°
26
93°
61°
27
89°
57°
28
89°
56°
29
88°
56°
30
95°
62°
31
102°
62°
1
106°
66°
2
113°
72°
3
114°
71°
4
114°
73°
5
112°
63°
6
113°
59°
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 88° to 114°, with overnight lows between 56° and 73°. The average high for May is 102° with an average low of 63°. 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.
