27.08
thu
thu
Day
66°F
E 18 mph
Precip.
28%
28%
Night
66°F
SE 9 mph
Precip.
14%
14%
28.08
fri
fri
Day
68°F
SE 10 mph
Precip.
10%
10%
Night
66°F
S 16 mph
Precip.
15%
15%
29.08
sat
sat
Day
66°F
S 17 mph
Precip.
9%
9%
Night
66°F
S 16 mph
Precip.
14%
14%
30.08
sun
sun
Day
68°F
S 12 mph
Precip.
13%
13%
Night
66°F
S 15 mph
Precip.
16%
16%
31.08
mon
mon
Day
66°F
S 21 mph
Precip.
9%
9%
Night
64°F
S 22 mph
Precip.
15%
15%
01.09
tue
tue
Day
66°F
S 24 mph
Precip.
9%
9%
Night
64°F
S 27 mph
Precip.
11%
11%
02.09
wed
wed
Day
66°F
S 25 mph
Precip.
9%
9%
Night
66°F
NW 24 mph
Precip.
15%
15%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 65.9°F. The highest and lowest sea temperatures during the month were 66.9°F and 64.2°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 62.6°F. The highest and lowest sea temperatures during the month were 66.0°F and 60.3°F.
Air temperature in Sintra, °F
Precipitation total in Sintra, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Sintra
Sintra on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Sintra
Local time: 09:24
August 27, thursday
1200
66°F
E
18 mph
18 mph
1500
66°F
E
16 mph
16 mph
1800
66°F
E
14 mph
14 mph
2100
66°F
SE
9 mph
9 mph
August 28, friday
0000
66°F
SE
9 mph
9 mph
0300
66°F
E
6 mph
6 mph
0600
66°F
E
6 mph
6 mph
0900
66°F
SE
7 mph
7 mph
