S
M
T
W
T
F
S
26
81°
64°
27
79°
60°
28
84°
61°
29
93°
59°
30
84°
64°
31
73°
61°
1
77°
56°
2
79°
54°
3
81°
61°
4
88°
61°
5
79°
64°
6
73°
55°
7
75°
50°
8
79°
48°
9
86°
57°
10
77°
61°
11
73°
54°
12
81°
61°
13
90°
65°
14
92°
64°
15
77°
59°
16
77°
58°
17
76°
62°
18
79°
60°
19
77°
56°
20
73°
58°
21
72°
57°
22
70°
56°
23
69°
56°
24
70°
56°
25
69°
55°
26
70°
54°
27
69°
51°
28
69°
51°
29
71°
55°
30
70°
55°
31
72°
54°
1
72°
53°
2
70°
50°
3
69°
49°
4
71°
54°
5
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Southend-on-Sea
Southend-on-Sea's August 2026 forecast shows daily high temperatures ranging from 69° to 92°, with overnight lows between 49° and 65°. The average high for August is 74° with an average low of 56°. 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 Southend-on-Sea. See also: September | October | November.