S
M
T
W
T
F
S
26
64°
59°
27
70°
57°
28
77°
66°
29
70°
57°
30
66°
54°
31
64°
50°
1
68°
52°
2
68°
52°
3
70°
59°
4
73°
59°
5
63°
55°
6
64°
54°
7
70°
54°
8
70°
54°
9
N/A
10
67°
52°
11
72°
58°
12
76°
62°
13
76°
62°
14
69°
53°
15
66°
54°
16
67°
55°
17
68°
58°
18
68°
56°
19
71°
59°
20
71°
55°
21
70°
57°
22
64°
54°
23
65°
53°
24
64°
52°
25
63°
52°
26
63°
51°
27
64°
51°
28
63°
50°
29
63°
50°
30
64°
51°
31
63°
52°
1
63°
55°
2
67°
55°
3
67°
54°
4
63°
54°
5
63°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Belfast
Belfast's August 2026 forecast shows daily high temperatures ranging from 63° to 76°, with overnight lows between 50° and 62°. 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.
