S
M
T
W
T
F
S
26
79°
57°
27
78°
57°
28
77°
56°
29
75°
53°
30
76°
56°
31
73°
58°
1
75°
57°
2
76°
56°
3
76°
56°
4
75°
57°
5
74°
56°
6
77°
57°
7
77°
57°
8
76°
56°
9
77°
57°
10
78°
57°
11
77°
56°
12
79°
58°
13
77°
57°
14
75°
55°
15
76°
56°
16
72°
56°
17
76°
55°
18
74°
55°
19
74°
54°
20
76°
53°
21
76°
55°
22
75°
54°
23
76°
51°
24
75°
55°
25
76°
53°
26
72°
54°
27
71°
49°
28
70°
52°
29
69°
53°
30
69°
50°
31
70°
52°
1
69°
53°
2
71°
50°
3
70°
49°
4
68°
50°
5
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Swanley
Swanley's August 2026 forecast shows daily high temperatures ranging from 68° to 79°, with overnight lows between 49° and 58°. The average high for August is 74° with an average low of 55°. 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 Swanley. See also: September | October | November.