S
M
T
W
T
F
S
26
67°
60°
27
65°
59°
28
65°
59°
29
64°
55°
30
75°
54°
31
67°
56°
1
69°
55°
2
68°
54°
3
66°
54°
4
66°
54°
5
64°
54°
6
65°
55°
7
64°
56°
8
66°
54°
9
64°
54°
10
63°
55°
11
64°
55°
12
66°
54°
13
64°
56°
14
66°
56°
15
63°
55°
16
63°
55°
17
67°
56°
18
68°
56°
19
68°
57°
20
69°
58°
21
69°
58°
22
68°
57°
23
69°
57°
24
68°
56°
25
67°
57°
26
68°
57°
27
69°
56°
28
66°
56°
29
63°
55°
30
67°
56°
31
68°
56°
1
67°
55°
2
66°
56°
3
63°
56°
4
64°
55°
5
67°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Half Moon Bay
Half Moon Bay's August 2026 forecast shows daily high temperatures ranging from 63° to 75°, with overnight lows between 54° and 58°. The average high for August is 66° with an average low of 56°. 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 Half Moon Bay. See also: September | October | November.
