29.12
mon
mon
Day
57°F
SW 4 mph
Precip.
0%
0%
Night
50°F
SW 4 mph
Precip.
0%
0%
30.12
tue
tue
Day
55°F
W 5 mph
Precip.
0%
0%
Night
50°F
W 4 mph
Precip.
0%
0%
31.12
wed
wed
Day
54°F
NW 9 mph
Precip.
0%
0%
Night
52°F
NW 12 mph
Precip.
100%
100%
01.01
thu
thu
Day
57°F
NW 17 mph
Precip.
100%
100%
Night
59°F
N 27 mph
Precip.
100%
100%
02.01
fri
fri
Day
59°F
N 29 mph
Precip.
100%
100%
Night
55°F
NE 7 mph
Precip.
100%
100%
03.01
sat
sat
Day
57°F
N 12 mph
Precip.
100%
100%
Night
54°F
N 5 mph
Precip.
100%
100%
04.01
sun
sun
Day
52°F
SW 13 mph
Precip.
100%
100%
Night
48°F
S 17 mph
Precip.
76%
76%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 59.8°F. The highest and lowest sea temperatures during the month were 60.8°F and 57.4°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 60.0°F. The highest and lowest sea temperatures during the month were 60.8°F and 59.4°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: 12:45
December 29, monday
1500
59°F
S
3 mph
3 mph
1800
54°F
S
5 mph
5 mph
2100
54°F
SW
5 mph
5 mph
December 30, tuesday
0000
50°F
SW
4 mph
4 mph
0300
50°F
W
4 mph
4 mph
0600
48°F
W
4 mph
4 mph
0900
50°F
W
4 mph
4 mph
1200
55°F
W
5 mph
5 mph
