S
M
T
W
T
F
S
26
85°
66°
27
83°
67°
28
81°
67°
29
83°
66°
30
82°
66°
1
83°
65°
2
83°
67°
3
84°
68°
4
83°
68°
5
85°
67°
6
85°
67°
7
86°
68°
8
87°
69°
9
86°
68°
10
85°
69°
11
86°
69°
12
87°
70°
13
88°
70°
14
88°
69°
15
87°
71°
16
88°
71°
17
87°
70°
18
87°
71°
19
86°
71°
20
85°
70°
21
86°
70°
22
87°
68°
23
88°
68°
24
86°
69°
25
90°
70°
26
86°
71°
27
87°
70°
28
88°
68°
29
87°
69°
30
87°
71°
31
88°
72°
1
87°
71°
2
87°
69°
3
88°
70°
4
90°
70°
5
88°
71°
6
87°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Siesta Key
Siesta Key's May 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 65° and 72°. The average high for May is 86° with an average low of 69°. 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 Siesta Key. See also: June | July | August.
