S
M
T
W
T
F
S
26
63°
59°
27
67°
59°
28
66°
55°
29
69°
51°
30
68°
52°
31
73°
52°
1
67°
57°
2
68°
54°
3
73°
49°
4
79°
52°
5
79°
53°
6
67°
57°
7
67°
58°
8
69°
56°
9
66°
55°
10
66°
56°
11
66°
55°
12
66°
57°
13
64°
56°
14
64°
55°
15
67°
57°
16
65°
55°
17
66°
54°
18
66°
57°
19
66°
57°
20
67°
55°
21
65°
54°
22
68°
58°
23
70°
57°
24
82°
52°
25
66°
59°
26
68°
59°
27
67°
58°
28
69°
59°
29
67°
55°
30
68°
54°
31
72°
50°
1
66°
60°
2
64°
58°
3
65°
53°
4
70°
49°
5
71°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Copalis Beach
Copalis Beach's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Copalis Beach. See also: September | October | November.