S
M
T
W
T
F
S
26
78°
46°
27
77°
46°
28
73°
48°
29
70°
46°
30
69°
50°
31
70°
46°
1
70°
46°
2
72°
47°
3
70°
49°
4
70°
53°
5
77°
51°
6
77°
48°
7
78°
50°
8
77°
47°
9
69°
51°
10
70°
46°
11
72°
46°
12
74°
49°
13
73°
53°
14
77°
49°
15
79°
47°
16
78°
46°
17
78°
47°
18
77°
54°
19
71°
55°
20
71°
46°
21
69°
48°
22
70°
48°
23
73°
49°
24
76°
46°
25
77°
46°
26
77°
53°
27
72°
46°
28
67°
46°
29
67°
44°
30
72°
48°
31
73°
49°
1
68°
48°
2
67°
46°
3
68°
45°
4
68°
44°
5
68°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Friday Harbor
Friday Harbor's August 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 44° and 55°. The average high for August is 73° with an average low of 48°. 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 Friday Harbor. See also: September | October | November.
