S
M
T
W
T
F
S
26
92°
82°
27
93°
82°
28
91°
83°
29
92°
82°
30
90°
83°
31
92°
83°
1
92°
82°
2
93°
83°
3
92°
83°
4
94°
82°
5
94°
82°
6
93°
83°
7
92°
83°
8
93°
82°
9
93°
83°
10
91°
83°
11
93°
82°
12
93°
83°
13
92°
83°
14
93°
82°
15
93°
82°
16
92°
81°
17
93°
82°
18
94°
82°
19
93°
81°
20
94°
81°
21
92°
77°
22
90°
76°
23
90°
77°
24
89°
78°
25
90°
77°
26
91°
78°
27
92°
78°
28
89°
79°
29
89°
81°
30
93°
81°
31
93°
80°
1
92°
81°
2
94°
80°
3
94°
78°
4
92°
79°
5
93°
80°
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 89° to 94°, with overnight lows between 76° and 83°. The average high for August is 92° with an average low of 81°. 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.
