05.08
wed
wed
Day
73°F
SE 13 mph
Precip.
8%
8%
Night
68°F
S 16 mph
Precip.
12%
12%
06.08
thu
thu
Day
73°F
S 19 mph
Precip.
5%
5%
Night
70°F
S 17 mph
Precip.
10%
10%
07.08
fri
fri
Day
73°F
S 16 mph
Precip.
6%
6%
Night
70°F
S 14 mph
Precip.
12%
12%
08.08
sat
sat
Day
73°F
SE 11 mph
Precip.
6%
6%
Night
70°F
S 12 mph
Precip.
20%
20%
09.08
sun
sun
Day
72°F
SE 12 mph
Precip.
8%
8%
Night
68°F
S 13 mph
Precip.
14%
14%
10.08
mon
mon
Day
72°F
SE 12 mph
Precip.
7%
7%
Night
68°F
S 13 mph
Precip.
13%
13%
11.08
tue
tue
Day
73°F
SE 12 mph
Precip.
7%
7%
Night
68°F
S 14 mph
Precip.
11%
11%
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 65.2°F. The highest and lowest sea temperatures during the month were 67.5°F and 63.3°F.
Air temperature in Cascais, °F
Precipitation total in Cascais, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 18:47
August 05, wednesday
2100
70°F
S
16 mph
16 mph
August 06, thursday
0000
68°F
S
16 mph
16 mph
0300
68°F
S
16 mph
16 mph
0600
68°F
S
16 mph
16 mph
0900
70°F
S
16 mph
16 mph
1200
73°F
S
19 mph
19 mph
1500
73°F
S
19 mph
19 mph
1800
73°F
S
20 mph
20 mph
