S
M
T
W
T
F
S
26
77°
57°
27
78°
58°
28
78°
59°
29
79°
60°
30
79°
59°
31
83°
57°
1
84°
61°
2
84°
63°
3
82°
63°
4
82°
59°
5
81°
58°
6
81°
56°
7
77°
56°
8
77°
57°
9
78°
57°
10
80°
58°
11
80°
57°
12
81°
58°
13
83°
56°
14
82°
60°
15
83°
61°
16
83°
61°
17
82°
60°
18
82°
60°
19
77°
58°
20
76°
57°
21
81°
60°
22
80°
60°
23
77°
55°
24
78°
60°
25
81°
60°
26
82°
59°
27
82°
60°
28
82°
60°
29
80°
58°
30
81°
59°
31
81°
58°
1
80°
57°
2
77°
57°
3
78°
56°
4
80°
58°
5
80°
59°
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 76° to 84°, with overnight lows between 55° and 63°. The average high for August is 80° with an average low of 59°. 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.
