S
M
T
W
T
F
S
26
70°
63°
27
68°
59°
28
70°
64°
29
70°
63°
30
72°
52°
31
70°
43°
1
70°
45°
2
77°
54°
3
77°
55°
4
72°
66°
5
68°
59°
6
70°
50°
7
68°
45°
8
70°
45°
9
73°
46°
10
75°
52°
11
82°
46°
12
91°
55°
13
79°
57°
14
73°
63°
15
73°
57°
16
70°
55°
17
72°
64°
18
72°
64°
19
70°
57°
20
68°
59°
21
68°
54°
22
68°
46°
23
70°
46°
24
75°
54°
25
68°
55°
26
75°
62°
27
69°
61°
28
68°
61°
29
68°
59°
30
67°
57°
31
66°
57°
1
67°
58°
2
68°
60°
3
67°
59°
4
67°
56°
5
66°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Castlemartin
Castlemartin's August 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 55° and 62°. The average high for August is 68° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Castlemartin. See also: September | October | November.
