S
M
T
W
T
F
S
26
72°
61°
27
75°
63°
28
72°
63°
29
66°
59°
30
68°
55°
1
68°
55°
2
70°
61°
3
68°
55°
4
70°
55°
5
73°
54°
6
72°
54°
7
66°
55°
8
66°
55°
9
68°
61°
10
68°
59°
11
68°
61°
12
68°
57°
13
68°
57°
14
72°
57°
15
N/A
16
75°
55°
17
74°
53°
18
74°
57°
19
78°
61°
20
83°
61°
21
88°
61°
22
89°
62°
23
88°
61°
24
83°
61°
25
82°
59°
26
81°
60°
27
82°
61°
28
75°
55°
29
75°
54°
30
76°
55°
31
78°
55°
1
80°
56°
2
82°
58°
3
83°
58°
4
83°
59°
5
84°
58°
6
83°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Castro Marim
Castro Marim's May 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 53° and 62°. The average high for May is 81° with an average low of 58°. 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 Castro Marim. See also: June | July | August.
