S
M
T
W
T
F
S
26
66°
57°
27
67°
56°
28
66°
55°
29
65°
56°
30
66°
56°
31
67°
57°
1
68°
55°
2
66°
55°
3
67°
52°
4
67°
56°
5
68°
54°
6
67°
52°
7
68°
52°
8
67°
53°
9
69°
52°
10
69°
52°
11
70°
56°
12
70°
57°
13
68°
56°
14
70°
56°
15
70°
55°
16
68°
56°
17
67°
54°
18
65°
55°
19
66°
52°
20
68°
55°
21
69°
54°
22
69°
52°
23
68°
55°
24
65°
53°
25
66°
53°
26
65°
52°
27
65°
55°
28
66°
55°
29
67°
54°
30
66°
55°
31
67°
54°
1
67°
52°
2
66°
53°
3
65°
52°
4
66°
52°
5
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Belfast
Belfast's August 2026 forecast shows daily high temperatures ranging from 65° to 70°, with overnight lows between 51° and 57°. The average high for August is 67° with an average low of 54°. 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 Belfast. See also: September | October | November.
