Average sea water temperature in August:
+64.1°F
| Minimum sea water temperature in August: | 68.2°F |
| Maximum sea water temperature in August: | 58.6°F |
Daily 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.
Monthly sea water temperature in Cascais, °F
Which Portugal resorts have warmest sea in August?
| Place name | August 2026 | August 2025 |
|---|---|---|
| Madeira | 76.6°F | 75.2°F |
| Funchal | 76.6°F | 75.2°F |
| Canico | 76.5°F | 75.0°F |
| Porto Santo Island | 76.0°F | 73.7°F |
| Corvo Island | 75.1°F | 75.0°F |
| Santa Maria Island | 74.9°F | 74.8°F |
| Flores Island | 74.5°F | 75.0°F |
| Sao Jorge | 74.5°F | 75.1°F |
| Pico Island | 74.3°F | 74.6°F |
| Faial Island | 74.3°F | 74.5°F |
| Graciosa | 74.3°F | 75.3°F |
| Terceira Island | 73.5°F | 74.3°F |
| Sao Miguel | 73.2°F | 74.1°F |
| Ponta Delgada | 73.1°F | 74.2°F |
| Lisbon | 70.1°F | 70.2°F |
| Tavira | 69.3°F | 73.9°F |
| Setubal | 68.9°F | 68.4°F |
| Faro | 68.7°F | 73.4°F |
| Algarve | 68.7°F | 73.4°F |
| Quarteira | 67.6°F | 72.5°F |
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 01:32
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
