S
M
T
W
T
F
S
26
74°
53°
27
74°
50°
28
77°
55°
29
69°
54°
30
68°
52°
31
68°
52°
1
69°
54°
2
69°
52°
3
70°
54°
4
69°
52°
5
70°
54°
6
76°
55°
7
75°
54°
8
74°
54°
9
76°
55°
10
77°
55°
11
76°
54°
12
78°
56°
13
78°
55°
14
76°
55°
15
76°
54°
16
75°
55°
17
77°
55°
18
76°
54°
19
77°
55°
20
77°
55°
21
76°
54°
22
77°
55°
23
77°
55°
24
75°
47°
25
73°
53°
26
76°
53°
27
77°
54°
28
79°
53°
29
78°
51°
30
78°
54°
31
76°
53°
1
76°
52°
2
75°
46°
3
76°
45°
4
76°
46°
5
74°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lopez Island
Lopez Island's August 2026 forecast shows daily high temperatures ranging from 68° to 79°, with overnight lows between 45° and 56°. The average high for August is 75° with an average low of 53°. 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 Lopez Island. See also: September | October | November.