S
M
T
W
T
F
S
26
83°
63°
27
82°
65°
28
81°
63°
29
82°
62°
30
80°
66°
31
81°
66°
1
87°
65°
2
86°
64°
3
84°
64°
4
81°
61°
5
81°
62°
6
82°
62°
7
81°
63°
8
81°
62°
9
82°
64°
10
81°
64°
11
82°
67°
12
83°
64°
13
85°
63°
14
81°
63°
15
82°
62°
16
84°
65°
17
84°
64°
18
85°
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 Lisbon
Lisbon's August 2026 forecast shows daily high temperatures ranging from 80° to 87°, with overnight lows between 61° and 67°. The average high for August is 83° 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 Lisbon. See also: September | October | November.
