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
59°
50°
3
59°
48°
4
57°
52°
5
59°
50°
6
57°
46°
7
57°
49°
8
63°
48°
9
65°
47°
10
60°
42°
11
58°
42°
12
58°
48°
13
57°
43°
14
55°
44°
15
56°
48°
16
55°
47°
17
57°
48°
18
59°
48°
19
58°
49°
20
57°
48°
21
58°
48°
22
58°
50°
23
59°
51°
24
59°
51°
25
60°
50°
26
63°
52°
27
63°
51°
28
59°
48°
29
59°
48°
30
61°
52°
31
61°
52°
1
64°
51°
2
65°
52°
3
65°
52°
4
63°
53°
5
65°
53°
6
66°
52°
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 55° to 66°, with overnight lows between 42° and 53°. The average high for May is 60° with an average low of 49°. 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.