S
M
T
W
T
F
S
26
60°
53°
27
60°
48°
28
60°
48°
29
61°
48°
30
61°
43°
1
65°
52°
2
59°
51°
3
63°
53°
4
63°
54°
5
63°
54°
6
62°
52°
7
60°
50°
8
61°
51°
9
65°
52°
10
65°
52°
11
64°
50°
12
64°
51°
13
66°
50°
14
62°
48°
15
58°
49°
16
58°
48°
17
59°
46°
18
57°
49°
19
57°
45°
20
58°
48°
21
60°
50°
22
64°
50°
23
65°
53°
24
67°
52°
25
66°
52°
26
64°
51°
27
60°
51°
28
59°
50°
29
59°
49°
30
58°
48°
31
58°
49°
1
59°
48°
2
59°
48°
3
60°
49°
4
63°
51°
5
62°
49°
6
59°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Half Moon Bay
Half Moon Bay's May 2026 forecast shows daily high temperatures ranging from 57° to 67°, with overnight lows between 45° and 54°. The average high for May is 61° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Half Moon Bay. See also: June | July | August.
