29.12
mon
mon
Day
55°F
SW 4 mph
Precip.
0%
0%
Night
52°F
SW 5 mph
Precip.
0%
0%
30.12
tue
tue
Day
54°F
W 6 mph
Precip.
0%
0%
Night
52°F
W 4 mph
Precip.
0%
0%
31.12
wed
wed
Day
54°F
NW 10 mph
Precip.
0%
0%
Night
54°F
NW 15 mph
Precip.
100%
100%
01.01
thu
thu
Day
61°F
NW 17 mph
Precip.
100%
100%
Night
61°F
N 30 mph
Precip.
63%
63%
02.01
fri
fri
Day
61°F
N 31 mph
Precip.
100%
100%
Night
57°F
NE 8 mph
Precip.
100%
100%
03.01
sat
sat
Day
59°F
N 14 mph
Precip.
100%
100%
Night
55°F
N 7 mph
Precip.
100%
100%
04.01
sun
sun
Day
54°F
SW 14 mph
Precip.
100%
100%
Night
50°F
S 19 mph
Precip.
88%
88%
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 60.6°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 60.1°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: 13:26
December 29, monday
1500
57°F
SE
3 mph
3 mph
1800
54°F
S
6 mph
6 mph
2100
54°F
SW
6 mph
6 mph
December 30, tuesday
0000
52°F
SW
5 mph
5 mph
0300
52°F
W
5 mph
5 mph
0600
50°F
W
6 mph
6 mph
0900
50°F
W
6 mph
6 mph
1200
54°F
W
6 mph
6 mph
