S
M
T
W
T
F
S
26
77°
62°
27
74°
66°
28
71°
57°
29
73°
55°
30
70°
52°
1
68°
58°
2
76°
59°
3
75°
59°
4
77°
60°
5
69°
59°
6
69°
56°
7
71°
60°
8
73°
62°
9
72°
61°
10
70°
60°
11
70°
60°
12
71°
61°
13
71°
62°
14
69°
61°
15
69°
60°
16
70°
56°
17
67°
54°
18
67°
54°
19
68°
56°
20
69°
58°
21
68°
59°
22
68°
60°
23
71°
59°
24
71°
60°
25
68°
60°
26
67°
59°
27
68°
60°
28
68°
60°
29
69°
59°
30
67°
59°
31
69°
58°
1
69°
59°
2
72°
60°
3
70°
58°
4
67°
58°
5
68°
54°
6
69°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rottnest Island
Rottnest Island's May 2026 forecast shows daily high temperatures ranging from 67° to 77°, with overnight lows between 52° and 66°. The average high for May is 70° with an average low of 59°. 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 Rottnest Island. See also: June | July | August.
