S
M
T
W
T
F
S
30
66°
57°
31
68°
53°
1
67°
52°
2
65°
56°
3
65°
51°
4
70°
51°
5
66°
53°
6
67°
52°
7
69°
53°
8
68°
55°
9
69°
52°
10
67°
56°
11
68°
55°
12
68°
55°
13
69°
54°
14
68°
55°
15
69°
54°
16
66°
54°
17
64°
53°
18
65°
53°
19
64°
48°
20
62°
49°
21
63°
48°
22
62°
47°
23
63°
53°
24
65°
54°
25
65°
54°
26
64°
53°
27
65°
53°
28
65°
52°
29
62°
48°
30
60°
49°
1
60°
46°
2
59°
46°
3
59°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Porthcawl
Porthcawl's September 2026 forecast shows daily high temperatures ranging from 59° to 70°, with overnight lows between 46° and 57°. The average high for September is 65° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Porthcawl. See also: October | November | December.
