12.18
thu
thu
DAY
62°F
N 16 mph
precip
0%
0%
NIGHT
60°F
E 9 mph
precip
100%
100%
12.19
fri
fri
DAY
58°F
S 20 mph
precip
88%
88%
NIGHT
56°F
S 17 mph
precip
0%
0%
12.20
sat
sat
DAY
58°F
E 14 mph
precip
100%
100%
NIGHT
54°F
SE 17 mph
precip
100%
100%
12.21
sun
sun
DAY
56°F
E 15 mph
precip
100%
100%
NIGHT
56°F
E 22 mph
precip
100%
100%
12.22
mon
mon
DAY
58°F
E 26 mph
precip
100%
100%
NIGHT
58°F
E 8 mph
precip
0%
0%
12.23
tue
tue
DAY
60°F
NE 31 mph
precip
100%
100%
NIGHT
58°F
SE 24 mph
precip
100%
100%
12.24
wed
wed
DAY
58°F
SE 30 mph
precip
100%
100%
NIGHT
56°F
SE 26 mph
precip
100%
100%
12.25
thu
thu
DAY
58°F
SE 19 mph
precip
65%
65%
NIGHT
58°F
SE 25 mph
precip
100%
100%
12.26
fri
fri
DAY
58°F
S 22 mph
precip
0%
0%
NIGHT
52°F
S 2 mph
precip
0%
0%
12.27
sat
sat
DAY
52°F
NW 17 mph
precip
100%
100%
NIGHT
50°F
NW 6 mph
precip
70%
70%
12.28
sun
sun
DAY
50°F
NW 11 mph
precip
100%
100%
NIGHT
50°F
SW 12 mph
precip
0%
0%
12.29
mon
mon
DAY
54°F
S 10 mph
precip
0%
0%
NIGHT
50°F
S 13 mph
precip
0%
0%
12.30
tue
tue
DAY
54°F
S 14 mph
precip
0%
0%
NIGHT
48°F
S 9 mph
precip
0%
0%
12.31
wed
wed
DAY
50°F
W 7 mph
precip
0%
0%
NIGHT
46°F
SW 10 mph
precip
0%
0%
Sea water
temperature
temperature
| Cascais |
Weather in
December
December
| Cascais |
7 day weather
forecast
forecast
| Cascais |
10 day weather
forecast
forecast
| Cascais |
14 day weather
forecast
forecast
| Cascais |
Monthly weather
averages
averages
| Cascais |
Current Weather
Conditions
Conditions
| Cascais |
When is the Best
Time to Visit?
Time to Visit?
| Cascais |
Cascais Sea Water Temperature in December, °F
The average sea surface temperature in December 2025 for Cascais was 61.6°F. The maximum and minimum values were 61.0°F and 61.8°F respectively.
Cascais on the Weather Map
Portugal Resorts:
NAME
F°
| Albufeira |  |
+54 |
| Algarve |  |
+56 |
| Cascais | |
+58 |
| Faro | |
+56 |
| Funchal | |
+54 |
| Lagos | |
+56 |
| Lisbon | |
+52 |
| Madeira | |
+54 |
| Ponta Delgada |  |
+60 |
| Portimao | |
+52 |
| Porto | |
+50 |
| Porto Santo Island | |
+66 |
| Quarteira | |
+54 |
| Sao Miguel | |
+60 |
| Terceira Island | |
+54 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Cascais
Local time: 09:13
18 dec, thursday
| 1200 | |
62°F | N 16 mph |
| 1500 | |
62°F | N 17 mph |
| 1800 | |
60°F | N 19 mph |
| 2100 | |
62°F | N 18 mph |
19 dec, friday
| 0000 | |
60°F | E 9 mph |
| 0300 | |
58°F | S 16 mph |
| 0600 | |
56°F | S 24 mph |
| 0900 | |
58°F | S 21 mph |