Current sea water temperature:
+66.4°F
| Minimum sea water temperature in August: | 68.2°F |
| Maximum sea water temperature in August: | 58.6°F |
| Average sea water temperature in August: | 64.1°F |
| more information | |
14 days
forecast
forecast
| Cascais |
monthly
weather
weather
| Cascais |
Sea water temperature for the last 10 days:
| August 26 | 66.4°F | August 21 | 66.4°F |
| August 25 | 66.4°F | August 20 | 66.9°F |
| August 24 | 66.4°F | August 19 | 66.4°F |
| August 23 | 66.4°F | August 18 | 65.8°F |
| August 22 | 65.7°F | August 17 | 66.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Cascais?
Based on the data about daily sea water temperature for the last three years the warmest sea in Cascais was noticed in September, October and August.
Monthly Sea Temperatures in Cascais, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 62.6°F. The highest and lowest sea temperatures during the month were 65.5°F and 60.3°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 63.2°F. The highest and lowest sea temperatures during the month were 65.8°F and 61.5°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 65.5°F. The highest and lowest sea temperatures during the month were 66.9°F and 63.7°F.
current
weather
weather
| Cascais |
weather in
August
August
| Cascais |
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 00:44
August 27, thursday
0300
66°F
NE
16 mph
16 mph
0600
66°F
NE
24 mph
24 mph
0900
66°F
E
20 mph
20 mph
1200
68°F
E
17 mph
17 mph
1500
68°F
E
15 mph
15 mph
1800
68°F
E
14 mph
14 mph
2100
68°F
SE
9 mph
9 mph
August 28, friday
0000
66°F
SE
5 mph
5 mph
