S
M
T
W
T
F
S
26
91°
63°
27
92°
64°
28
90°
63°
29
90°
64°
30
89°
67°
31
90°
68°
1
95°
67°
2
95°
66°
3
94°
64°
4
90°
62°
5
89°
61°
6
89°
63°
7
90°
62°
8
89°
62°
9
90°
65°
10
91°
64°
11
89°
67°
12
93°
64°
13
94°
62°
14
89°
64°
15
89°
60°
16
93°
66°
17
93°
65°
18
93°
62°
19
Hist. Avg.
79°
63°
20
Hist. Avg.
79°
63°
21
Hist. Avg.
79°
63°
22
Hist. Avg.
79°
63°
23
Hist. Avg.
79°
63°
24
Hist. Avg.
78°
63°
25
Hist. Avg.
78°
63°
26
Hist. Avg.
78°
63°
27
Hist. Avg.
78°
63°
28
Hist. Avg.
78°
63°
29
Hist. Avg.
78°
63°
30
Hist. Avg.
78°
63°
31
Hist. Avg.
78°
63°
1
Hist. Avg.
77°
62°
2
Hist. Avg.
77°
62°
3
Hist. Avg.
77°
62°
4
Hist. Avg.
77°
62°
5
Hist. Avg.
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Portugal
Portugal's August 2026 forecast shows daily high temperatures ranging from 89° to 95°, with overnight lows between 60° and 68°. The average high for August is 91° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Portugal. See also: September | October | November.
