S
M
T
W
T
F
S
26
64°
41°
27
68°
45°
28
57°
45°
29
68°
43°
30
72°
50°
1
61°
50°
2
60°
50°
3
59°
49°
4
58°
49°
5
56°
44°
6
56°
43°
7
56°
44°
8
56°
46°
9
57°
46°
10
56°
47°
11
57°
47°
12
57°
49°
13
57°
47°
14
56°
48°
15
59°
50°
16
56°
47°
17
57°
45°
18
58°
48°
19
58°
47°
20
57°
46°
21
57°
48°
22
58°
47°
23
58°
50°
24
59°
51°
25
59°
51°
26
60°
50°
27
59°
50°
28
59°
47°
29
60°
46°
30
61°
49°
31
62°
48°
1
60°
48°
2
61°
49°
3
65°
52°
4
63°
50°
5
62°
50°
6
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gorseinon
Gorseinon's May 2026 forecast shows daily high temperatures ranging from 56° to 65°, with overnight lows between 43° and 53°. 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 Gorseinon. See also: June | July | August.