Measurements:
°C
°F
CURRENT WEATHER
10:01
Cascais
56°F
S 15 mph
Feels like: 52°F
Precip: 0%
World Resorts Portugal Cascais Weather

7 Day Weather Forecast

12.17
wed
DAY
58°F
S 9 mph
precip
0%
NIGHT
56°F
NW 6 mph
precip
0%
12.18
thu
DAY
60°F
N 15 mph
precip
0%
NIGHT
60°F
NE 19 mph
precip
100%
12.19
fri
DAY
58°F
S 21 mph
precip
0%
NIGHT
56°F
SE 14 mph
precip
0%
12.20
sat
DAY
58°F
E 14 mph
precip
100%
NIGHT
58°F
E 19 mph
precip
100%
12.21
sun
DAY
56°F
E 14 mph
precip
100%
NIGHT
54°F
E 16 mph
precip
100%
12.22
mon
DAY
56°F
E 30 mph
precip
100%
NIGHT
58°F
SE 24 mph
precip
100%
12.23
tue
DAY
60°F
E 9 mph
precip
0%
NIGHT
58°F
NE 17 mph
precip
100%

Cascais Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Cascais was 15.8°F. The maximum and minimum values were 15.7°F and 15.9°F respectively.

Cascais on the Weather Map

Best Time to Visit Cascais
The most sunny months:
August 27 days
July 26 days
September 23 days
The most warm months:
August 79.5 °F
July 78.1 °F
September 77.6 °F
Warmest sea temperature:
September 66.3 °F
October 65.9 °F
August 65.5 °F
The most cold months:
January 60.2 °F
February 60.4 °F
March 62.3 °F
The most rainy months:
November 5 days
March 4 days
December 4 days
The most windy months:
July 14 mph
August 13 mph
June 13 mph
more details