S
M
T
W
T
F
S
26
87°
67°
27
88°
66°
28
86°
67°
29
85°
66°
30
82°
65°
31
79°
65°
1
79°
64°
2
80°
62°
3
81°
64°
4
80°
60°
5
79°
58°
6
78°
59°
7
81°
60°
8
82°
65°
9
79°
64°
10
83°
64°
11
83°
64°
12
84°
63°
13
85°
65°
14
85°
65°
15
83°
64°
16
77°
64°
17
78°
62°
18
79°
61°
19
83°
63°
20
84°
64°
21
77°
53°
22
75°
54°
23
77°
55°
24
76°
56°
25
77°
60°
26
80°
62°
27
83°
63°
28
86°
63°
29
87°
55°
30
85°
54°
31
77°
55°
1
77°
61°
2
79°
57°
3
83°
63°
4
84°
61°
5
85°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Galveston
Galveston's August 2026 forecast shows daily high temperatures ranging from 75° to 88°, with overnight lows between 52° and 67°. The average high for August is 81° with an average low of 61°. 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 Galveston. See also: September | October | November.
