S
M
T
W
T
F
S
26
92°
80°
27
94°
79°
28
94°
79°
29
92°
80°
30
90°
81°
31
91°
80°
1
91°
79°
2
92°
79°
3
92°
80°
4
91°
80°
5
91°
79°
6
92°
78°
7
92°
79°
8
93°
80°
9
92°
81°
10
93°
81°
11
93°
80°
12
92°
82°
13
94°
82°
14
95°
81°
15
94°
82°
16
95°
79°
17
92°
78°
18
93°
79°
19
93°
79°
20
90°
81°
21
94°
80°
22
90°
79°
23
90°
80°
24
Hist. Avg.
92°
79°
25
Hist. Avg.
92°
79°
26
Hist. Avg.
92°
79°
27
Hist. Avg.
91°
79°
28
Hist. Avg.
91°
79°
29
Hist. Avg.
91°
79°
30
Hist. Avg.
91°
79°
31
Hist. Avg.
91°
78°
1
Hist. Avg.
91°
78°
2
Hist. Avg.
91°
78°
3
Hist. Avg.
91°
78°
4
Hist. Avg.
90°
78°
5
Hist. Avg.
90°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Galveston
Galveston's August 2026 forecast shows daily high temperatures ranging from 90° to 95°, with overnight lows between 78° and 82°. The average high for August is 92° with an average low of 80°. 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.
