S
M
T
W
T
F
S
26
81°
71°
27
81°
69°
28
81°
73°
29
81°
71°
30
81°
70°
1
80°
68°
2
80°
69°
3
81°
69°
4
81°
65°
5
79°
66°
6
81°
67°
7
80°
70°
8
81°
69°
9
80°
68°
10
80°
72°
11
80°
68°
12
79°
68°
13
81°
67°
14
79°
73°
15
78°
73°
16
78°
72°
17
79°
73°
18
78°
73°
19
78°
72°
20
79°
73°
21
79°
73°
22
80°
72°
23
79°
73°
24
79°
73°
25
80°
74°
26
79°
73°
27
80°
72°
28
79°
73°
29
79°
74°
30
80°
73°
31
79°
74°
1
79°
74°
2
80°
73°
3
80°
74°
4
79°
74°
5
80°
75°
6
80°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kapa'a
Kapa'a's May 2026 forecast shows daily high temperatures ranging from 78° to 81°, with overnight lows between 65° and 75°. The average high for May is 80° with an average low of 71°. 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 Kapa'a. See also: June | July | August.
