Measurements:
°C
°F
CURRENT WEATHER
10:08
Cascais
66°F
S 20 mph
Feels like: 66°F
Precip: 0%
World Resorts Portugal Cascais Weather

7 Day Weather Forecast

05.30
sat
DAY
68°F
S 20 mph
precip
0%
NIGHT
64°F
S 22 mph
precip
0%
05.31
sun
DAY
70°F
S 22 mph
precip
0%
NIGHT
66°F
S 19 mph
precip
0%
06.01
mon
DAY
70°F
S 22 mph
precip
0%
NIGHT
66°F
S 23 mph
precip
0%
06.02
tue
DAY
68°F
S 22 mph
precip
0%
NIGHT
62°F
S 24 mph
precip
0%
06.03
wed
DAY
70°F
S 22 mph
precip
0%
NIGHT
64°F
S 22 mph
precip
0%
06.04
thu
DAY
66°F
S 20 mph
precip
0%
NIGHT
62°F
S 16 mph
precip
0%
06.05
fri
DAY
66°F
SE 9 mph
precip
0%
NIGHT
64°F
NE 8 mph
precip
58%

Cascais Sea Water Temperature in May, °F

Select Year: 2026 2025 2024

The average sea surface temperature in May 2026 for Cascais was 16.3°F. The maximum and minimum values were 15.1°F and 17.5°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 60.0 °F
February 60.3 °F
March 62.2 °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