Measurements:
°C
°F
CURRENT WEATHER
01:41
Cascais
68°F
N 16 mph
Feels like: 68°F
Precip: 28%
World Resorts Portugal Cascais Weather

7 Day Weather Forecast

09.29
tue
DAY
70°F
N 24 mph
precip
14%
NIGHT
68°F
N 16 mph
precip
94%
09.30
wed
DAY
68°F
S 8 mph
precip
21%
NIGHT
66°F
S 15 mph
precip
15%
10.01
thu
DAY
66°F
S 21 mph
precip
22%
NIGHT
64°F
S 22 mph
precip
11%
10.02
fri
DAY
66°F
S 10 mph
precip
26%
NIGHT
64°F
S 9 mph
precip
29%
10.03
sat
DAY
68°F
E 5 mph
precip
9%
NIGHT
66°F
S 7 mph
precip
28%
10.04
sun
DAY
68°F
NE 9 mph
precip
14%
NIGHT
66°F
S 15 mph
precip
17%
10.05
mon
DAY
66°F
S 20 mph
precip
20%
NIGHT
66°F
S 27 mph
precip
9%

Cascais Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Cascais was 18.1°F. The maximum and minimum values were 16.7°F and 19.4°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 79.2 °F
July 77.9 °F
September 77.2 °F
Warmest sea temperature:
September 66.3 °F
October 65.9 °F
August 65.6 °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
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