S
M
T
W
T
F
S
26
90°
82°
27
90°
82°
28
91°
82°
29
91°
82°
30
90°
83°
31
90°
82°
1
92°
82°
2
94°
82°
3
91°
80°
4
91°
82°
5
90°
82°
6
92°
83°
7
91°
82°
8
92°
82°
9
91°
83°
10
88°
78°
11
91°
83°
12
92°
84°
13
92°
84°
14
92°
83°
15
93°
83°
16
91°
80°
17
93°
79°
18
93°
82°
19
93°
83°
20
93°
84°
21
93°
82°
22
95°
82°
23
93°
81°
24
94°
82°
25
93°
83°
26
94°
82°
27
92°
79°
28
90°
79°
29
91°
80°
30
90°
81°
31
89°
80°
1
90°
82°
2
90°
81°
3
91°
80°
4
89°
81°
5
90°
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 79° and 82°. The average high for August is 91° 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.
