25.12
thu
thu
Day
54°F
SE 1 mph
Precip.
100%
100%
Night
52°F
S 18 mph
Precip.
0%
0%
26.12
fri
fri
Day
54°F
S 3 mph
Precip.
0%
0%
Night
50°F
NW 20 mph
Precip.
82%
82%
27.12
sat
sat
Day
54°F
NW 13 mph
Precip.
100%
100%
Night
50°F
W 21 mph
Precip.
75%
75%
28.12
sun
sun
Day
54°F
W 19 mph
Precip.
0%
0%
Night
52°F
SW 10 mph
Precip.
0%
0%
29.12
mon
mon
Day
55°F
W 13 mph
Precip.
0%
0%
Night
55°F
W 21 mph
Precip.
100%
100%
30.12
tue
tue
Day
57°F
NW 20 mph
Precip.
100%
100%
Night
55°F
NE 15 mph
Precip.
100%
100%
31.12
wed
wed
Day
57°F
NE 17 mph
Precip.
100%
100%
Night
54°F
W 7 mph
Precip.
100%
100%
01.01
thu
thu
Day
55°F
S 9 mph
Precip.
0%
0%
Night
50°F
S 16 mph
Precip.
0%
0%
02.01
fri
fri
Day
54°F
S 17 mph
Precip.
0%
0%
Night
46°F
SW 22 mph
Precip.
0%
0%
03.01
sat
sat
Day
46°F
SW 17 mph
Precip.
0%
0%
Night
43°F
SW 12 mph
Precip.
0%
0%
04.01
sun
sun
Day
46°F
SW 10 mph
Precip.
0%
0%
Night
43°F
W 7 mph
Precip.
0%
0%
05.01
mon
mon
Day
46°F
W 11 mph
Precip.
0%
0%
Night
45°F
SW 14 mph
Precip.
0%
0%
06.01
tue
tue
Day
48°F
SW 17 mph
Precip.
0%
0%
Night
48°F
W 16 mph
Precip.
67%
67%
07.01
wed
wed
Day
50°F
W 16 mph
Precip.
0%
0%
Night
48°F
W 18 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 60.6°F and 58.5°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 60.1°F. The highest and lowest sea temperatures during the month were 61.0°F and 59.5°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: 19:22
December 25, thursday
2100
52°F
S
13 mph
13 mph
December 26, friday
0000
52°F
S
18 mph
18 mph
0300
52°F
S
17 mph
17 mph
0600
50°F
S
14 mph
14 mph
0900
50°F
S
10 mph
10 mph
1200
54°F
S
3 mph
3 mph
1500
54°F
NW
9 mph
9 mph
1800
52°F
NW
12 mph
12 mph
