S
M
T
W
T
F
S
26
66°
50°
27
66°
48°
28
70°
59°
29
63°
50°
30
N/A
31
62°
50°
1
64°
49°
2
69°
49°
3
63°
54°
4
62°
53°
5
62°
48°
6
65°
45°
7
65°
47°
8
66°
48°
9
68°
50°
10
68°
53°
11
68°
50°
12
69°
51°
13
68°
52°
14
70°
53°
15
69°
54°
16
68°
54°
17
68°
53°
18
67°
53°
19
67°
52°
20
64°
53°
21
64°
50°
22
63°
49°
23
62°
52°
24
63°
52°
25
64°
51°
26
64°
50°
27
65°
51°
28
63°
51°
29
62°
52°
30
63°
51°
31
62°
48°
1
61°
50°
2
61°
48°
3
62°
48°
4
60°
47°
5
60°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort William
Fort William's August 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 45° and 54°. The average high for August is 65° with an average low of 51°. 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 Fort William. See also: September | October | November.