21.12
sun
sun
Day
54°F
SE 22 mph
Precip.
100%
100%
Night
52°F
SE 15 mph
Precip.
100%
100%
22.12
mon
mon
Day
55°F
S 16 mph
Precip.
100%
100%
Night
55°F
SE 20 mph
Precip.
100%
100%
23.12
tue
tue
Day
57°F
S 19 mph
Precip.
100%
100%
Night
52°F
S 16 mph
Precip.
0%
0%
24.12
wed
wed
Day
59°F
S 18 mph
Precip.
80%
80%
Night
55°F
SE 22 mph
Precip.
65%
65%
25.12
thu
thu
Day
54°F
S 19 mph
Precip.
69%
69%
Night
52°F
S 7 mph
Precip.
89%
89%
26.12
fri
fri
Day
50°F
W 9 mph
Precip.
0%
0%
Night
46°F
SW 9 mph
Precip.
0%
0%
27.12
sat
sat
Day
50°F
W 11 mph
Precip.
0%
0%
Night
48°F
S 7 mph
Precip.
100%
100%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 60.3°F. The highest and lowest sea temperatures during the month were 60.6°F and 59.4°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: 11:31
December 21, sunday
1200
54°F
SE
22 mph
22 mph
1500
54°F
SE
22 mph
22 mph
1800
52°F
SE
19 mph
19 mph
2100
52°F
SE
17 mph
17 mph
December 22, monday
0000
52°F
SE
15 mph
15 mph
0300
52°F
SE
15 mph
15 mph
0600
50°F
S
16 mph
16 mph
0900
52°F
S
15 mph
15 mph
