S
M
T
W
T
F
S
26
70°
49°
27
69°
53°
28
72°
53°
29
72°
52°
30
71°
53°
1
73°
53°
2
73°
54°
3
72°
54°
4
70°
51°
5
67°
48°
6
68°
50°
7
67°
49°
8
67°
50°
9
68°
52°
10
68°
50°
11
69°
49°
12
68°
49°
13
69°
50°
14
69°
49°
15
70°
49°
16
69°
50°
17
71°
50°
18
74°
51°
19
70°
50°
20
71°
51°
21
71°
50°
22
74°
54°
23
77°
52°
24
75°
57°
25
79°
59°
26
81°
56°
27
79°
55°
28
77°
52°
29
76°
50°
30
76°
53°
31
77°
52°
1
77°
55°
2
78°
59°
3
82°
61°
4
84°
59°
5
86°
55°
6
81°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Portel
Portel's May 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 48° and 61°. The average high for May is 73° with an average low of 52°. 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 Portel. See also: June | July | August.