S
M
T
W
T
F
S
26
81°
58°
27
79°
53°
28
80°
57°
29
80°
57°
30
81°
51°
31
77°
50°
1
76°
57°
2
80°
56°
3
82°
54°
4
81°
52°
5
80°
52°
6
78°
57°
7
80°
59°
8
81°
57°
9
82°
54°
10
81°
49°
11
79°
48°
12
74°
49°
13
77°
48°
14
76°
48°
15
75°
50°
16
79°
56°
17
80°
58°
18
79°
58°
19
80°
59°
20
81°
59°
21
80°
57°
22
78°
53°
23
77°
56°
24
78°
53°
25
70°
52°
26
69°
50°
27
69°
48°
28
67°
47°
29
69°
46°
30
69°
47°
31
70°
48°
1
69°
55°
2
68°
56°
3
67°
55°
4
67°
53°
5
66°
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 66° to 82°, with overnight lows between 46° and 59°. The average high for August is 76° with an average low of 53°. 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.
