S
M
T
W
T
F
S
26
86°
68°
27
91°
69°
28
93°
68°
29
89°
67°
30
87°
71°
1
81°
73°
2
81°
70°
3
78°
67°
4
82°
69°
5
83°
71°
6
84°
74°
7
85°
72°
8
84°
70°
9
84°
72°
10
85°
71°
11
86°
72°
12
85°
71°
13
86°
70°
14
84°
71°
15
83°
72°
16
83°
72°
17
84°
72°
18
85°
73°
19
85°
73°
20
84°
72°
21
87°
74°
22
87°
74°
23
88°
73°
24
88°
74°
25
87°
74°
26
87°
75°
27
86°
74°
28
84°
75°
29
85°
75°
30
86°
74°
31
83°
75°
1
82°
75°
2
84°
74°
3
84°
75°
4
85°
76°
5
86°
76°
6
85°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cayo Costa
Cayo Costa's May 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 67° and 76°. The average high for May is 84° with an average low of 73°. 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 Cayo Costa. See also: June | July | August.
