21.12
sun
sun
Day
54°F
SE 17 mph
Precip.
100%
100%
Night
54°F
SE 27 mph
Precip.
100%
100%
22.12
mon
mon
Day
57°F
SE 12 mph
Precip.
87%
87%
Night
57°F
E 19 mph
Precip.
100%
100%
23.12
tue
tue
Day
59°F
SE 16 mph
Precip.
82%
82%
Night
54°F
SE 21 mph
Precip.
100%
100%
24.12
wed
wed
Day
55°F
SE 25 mph
Precip.
100%
100%
Night
50°F
S 12 mph
Precip.
0%
0%
25.12
thu
thu
Day
55°F
S 13 mph
Precip.
87%
87%
Night
50°F
S 12 mph
Precip.
76%
76%
26.12
fri
fri
Day
50°F
SW 11 mph
Precip.
0%
0%
Night
45°F
SW 7 mph
Precip.
0%
0%
27.12
sat
sat
Day
50°F
N 3 mph
Precip.
0%
0%
Night
48°F
SE 1 mph
Precip.
100%
100%
28.12
sun
sun
Day
48°F
NW 7 mph
Precip.
100%
100%
Night
48°F
W 14 mph
Precip.
0%
0%
29.12
mon
mon
Day
48°F
W 25 mph
Precip.
100%
100%
Night
50°F
W 24 mph
Precip.
71%
71%
30.12
tue
tue
Day
50°F
W 24 mph
Precip.
0%
0%
Night
46°F
W 13 mph
Precip.
69%
69%
31.12
wed
wed
Day
46°F
W 10 mph
Precip.
69%
69%
Night
46°F
W 11 mph
Precip.
0%
0%
01.01
thu
thu
Day
50°F
W 21 mph
Precip.
100%
100%
Night
50°F
W 12 mph
Precip.
100%
100%
02.01
fri
fri
Day
52°F
SW 13 mph
Precip.
0%
0%
Night
50°F
SW 16 mph
Precip.
0%
0%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 60.4°F. The highest and lowest sea temperatures during the month were 60.8°F and 59.7°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: 00:20
December 21, sunday
0300
52°F
SE
22 mph
22 mph
0600
52°F
SE
17 mph
17 mph
0900
52°F
SE
14 mph
14 mph
1200
54°F
SE
17 mph
17 mph
1500
54°F
SE
21 mph
21 mph
1800
54°F
SE
19 mph
19 mph
2100
55°F
E
25 mph
25 mph
December 22, monday
0000
54°F
SE
27 mph
27 mph
