25.08
tue
tue
Day
73°F
NE 4 mph
Precip.
14%
14%
Night
68°F
NE 7 mph
Precip.
20%
20%
26.08
wed
wed
Day
72°F
E 11 mph
Precip.
35%
35%
Night
66°F
E 8 mph
Precip.
6%
6%
27.08
thu
thu
Day
70°F
E 15 mph
Precip.
36%
36%
Night
66°F
NE 9 mph
Precip.
17%
17%
28.08
fri
fri
Day
73°F
S 11 mph
Precip.
1%
1%
Night
64°F
S 9 mph
Precip.
9%
9%
29.08
sat
sat
Day
79°F
S 8 mph
Precip.
1%
1%
Night
66°F
S 10 mph
Precip.
10%
10%
30.08
sun
sun
Day
81°F
SE 13 mph
Precip.
2%
2%
Night
70°F
S 9 mph
Precip.
11%
11%
31.08
mon
mon
Day
81°F
S 13 mph
Precip.
1%
1%
Night
66°F
S 11 mph
Precip.
11%
11%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 70.2°F. The highest and lowest sea temperatures during the month were 72.1°F and 68.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 65.9°F. The highest and lowest sea temperatures during the month were 69.3°F and 63.0°F.
Air temperature in Lisbon, °F
Precipitation total in Lisbon, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Lisbon
Lisbon on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Lisbon
Local time: 23:45
August 26, wednesday
0000
68°F
NE
7 mph
7 mph
0300
66°F
NE
6 mph
6 mph
0600
66°F
NE
6 mph
6 mph
0900
70°F
NE
12 mph
12 mph
1200
72°F
E
11 mph
11 mph
1500
75°F
E
13 mph
13 mph
1800
72°F
E
11 mph
11 mph
2100
68°F
E
7 mph
7 mph
