S
M
T
W
T
F
S
26
81°
57°
27
86°
59°
28
75°
59°
29
66°
57°
30
68°
59°
1
70°
54°
2
68°
57°
3
66°
54°
4
66°
54°
5
66°
54°
6
68°
54°
7
66°
54°
8
66°
54°
9
64°
54°
10
64°
52°
11
66°
57°
12
66°
55°
13
66°
54°
14
66°
55°
15
66°
55°
16
68°
55°
17
66°
54°
18
67°
56°
19
70°
56°
20
84°
60°
21
87°
62°
22
83°
59°
23
78°
59°
24
79°
64°
25
80°
66°
26
79°
65°
27
81°
66°
28
78°
65°
29
79°
66°
30
77°
64°
31
78°
66°
1
78°
66°
2
79°
67°
3
80°
66°
4
79°
66°
5
79°
67°
6
78°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Estoril
Estoril's May 2026 forecast shows daily high temperatures ranging from 66° to 87°, with overnight lows between 54° and 67°. The average high for May is 78° with an average low of 63°. 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 Estoril. See also: June | July | August.