S
M
T
W
T
F
S
26
86°
82°
27
87°
81°
28
86°
82°
29
87°
82°
30
87°
81°
31
88°
82°
1
87°
82°
2
88°
81°
3
89°
80°
4
88°
79°
5
88°
79°
6
90°
81°
7
89°
80°
8
88°
80°
9
89°
79°
10
88°
78°
11
88°
79°
12
89°
78°
13
88°
79°
14
88°
79°
15
89°
80°
16
90°
79°
17
89°
80°
18
88°
79°
19
89°
80°
20
88°
78°
21
88°
78°
22
89°
79°
23
88°
78°
24
88°
78°
25
89°
79°
26
90°
79°
27
89°
80°
28
90°
79°
29
91°
80°
30
91°
80°
31
90°
79°
1
90°
79°
2
89°
80°
3
90°
79°
4
89°
80°
5
90°
80°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ko Samui
Ko Samui's August 2026 forecast shows daily high temperatures ranging from 86° to 91°, with overnight lows between 78° and 82°. The average high for August is 89° 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 Ko Samui. See also: September | October | November.
