S
M
T
W
T
F
S
26
76°
58°
27
77°
60°
28
68°
57°
29
67°
54°
30
67°
54°
31
69°
55°
1
69°
58°
2
73°
59°
3
77°
59°
4
76°
54°
5
76°
53°
6
77°
53°
7
76°
58°
8
71°
53°
9
69°
52°
10
71°
51°
11
69°
52°
12
69°
52°
13
68°
53°
14
71°
53°
15
76°
52°
16
74°
52°
17
68°
58°
18
66°
54°
19
66°
52°
20
68°
59°
21
68°
60°
22
67°
58°
23
68°
57°
24
67°
53°
25
66°
53°
26
67°
60°
27
69°
57°
28
70°
59°
29
73°
58°
30
73°
56°
31
74°
53°
1
72°
54°
2
Hist. Avg.
71°
51°
3
Hist. Avg.
70°
51°
4
Hist. Avg.
70°
50°
5
Hist. Avg.
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Halfmoon Bay
Halfmoon Bay's August 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 51° and 60°. The average high for August is 71° with an average low of 55°. 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 Halfmoon Bay. See also: September | October | November.
