S
M
T
W
T
F
S
26
70°
37°
27
62°
43°
28
60°
46°
29
69°
40°
30
73°
41°
1
74°
46°
2
80°
46°
3
82°
46°
4
84°
47°
5
72°
49°
6
64°
49°
7
67°
52°
8
65°
49°
9
69°
45°
10
70°
49°
11
72°
42°
12
80°
42°
13
65°
54°
14
63°
47°
15
58°
47°
16
57°
42°
17
68°
35°
18
69°
45°
19
66°
50°
20
71°
44°
21
75°
42°
22
76°
47°
23
70°
49°
24
67°
44°
25
63°
51°
26
67°
48°
27
80°
46°
28
81°
53°
29
67°
44°
30
67°
45°
31
71°
46°
1
77°
52°
2
75°
54°
3
70°
51°
4
69°
50°
5
68°
51°
6
67°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Thetis Island
Thetis Island's May 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 44° and 54°. The average high for May is 71° 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 Thetis Island. See also: June | July | August.
