26.12
fri
fri
Day
52°F
NW 4 mph
Precip.
66%
66%
Night
46°F
W 15 mph
Precip.
0%
0%
27.12
sat
sat
Day
50°F
W 21 mph
Precip.
100%
100%
Night
50°F
W 19 mph
Precip.
0%
0%
28.12
sun
sun
Day
55°F
W 14 mph
Precip.
0%
0%
Night
50°F
SW 7 mph
Precip.
0%
0%
29.12
mon
mon
Day
55°F
SW 2 mph
Precip.
0%
0%
Night
50°F
W 4 mph
Precip.
0%
0%
30.12
tue
tue
Day
54°F
W 4 mph
Precip.
0%
0%
Night
50°F
S 4 mph
Precip.
0%
0%
31.12
wed
wed
Day
55°F
S 9 mph
Precip.
81%
81%
Night
52°F
S 12 mph
Precip.
0%
0%
01.01
thu
thu
Day
55°F
S 8 mph
Precip.
86%
86%
Night
46°F
SW 8 mph
Precip.
0%
0%
02.01
fri
fri
Day
52°F
SW 7 mph
Precip.
0%
0%
Night
46°F
S 7 mph
Precip.
0%
0%
03.01
sat
sat
Day
55°F
S 11 mph
Precip.
0%
0%
Night
39°F
SW 9 mph
Precip.
0%
0%
04.01
sun
sun
Day
59°F
SE 16 mph
Precip.
60%
60%
Night
54°F
S 23 mph
Precip.
0%
0%
05.01
mon
mon
Day
55°F
S 20 mph
Precip.
0%
0%
Night
50°F
S 12 mph
Precip.
0%
0%
06.01
tue
tue
Day
55°F
S 13 mph
Precip.
0%
0%
Night
52°F
S 8 mph
Precip.
0%
0%
07.01
wed
wed
Day
59°F
S 8 mph
Precip.
0%
0%
Night
54°F
S 8 mph
Precip.
0%
0%
08.01
thu
thu
Day
59°F
S 13 mph
Precip.
0%
0%
Night
55°F
SE 8 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 60.1°F. The highest and lowest sea temperatures during the month were 60.8°F and 58.6°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: 01:42
December 26, friday
0300
48°F
S
11 mph
11 mph
0600
48°F
S
6 mph
6 mph
0900
50°F
S
4 mph
4 mph
1200
52°F
NW
4 mph
4 mph
1500
54°F
N
7 mph
7 mph
1800
50°F
NW
9 mph
9 mph
2100
48°F
NW
12 mph
12 mph
December 27, saturday
0000
46°F
W
15 mph
15 mph
