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
N/A
3
58°
50°
4
58°
46°
5
57°
43°
6
53°
43°
7
55°
44°
8
56°
46°
9
58°
45°
10
56°
46°
11
58°
45°
12
59°
47°
13
57°
47°
14
58°
46°
15
56°
52°
16
53°
51°
17
54°
49°
18
55°
52°
19
54°
52°
20
54°
51°
21
55°
51°
22
55°
50°
23
56°
53°
24
55°
53°
25
55°
52°
26
56°
53°
27
55°
53°
28
55°
50°
29
56°
49°
30
58°
50°
31
57°
52°
1
56°
54°
2
58°
52°
3
61°
55°
4
60°
54°
5
59°
54°
6
62°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Castlemartin
Castlemartin's May 2026 forecast shows daily high temperatures ranging from 53° to 62°, with overnight lows between 43° and 55°. The average high for May is 57° with an average low of 50°. 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 Castlemartin. See also: June | July | August.
