In August warmest sea in Portugal is usually observed in the following locations: Graciosa, Madeira, Funchal.
Table below shows the average sea water temperature for marine resorts of Portugal in August for the last three years.
| Place name | August 2025 | August 2024 | August 2023 |
|---|---|---|---|
| Graciosa | 75.3°F | 77.5°F | 75.1°F |
| Madeira | 75.2°F | 75.5°F | 76.7°F |
| Funchal | 75.2°F | 75.5°F | 76.7°F |
| Sao Jorge | 75.1°F | 77.9°F | 74.8°F |
| Corvo Island | 75.0°F | 77.9°F | 76.0°F |
| Canico | 75.0°F | 75.1°F | 76.5°F |
| Flores Island | 75.0°F | 78.2°F | 76.3°F |
| Santa Maria Island | 74.8°F | 78.1°F | 76.4°F |
| Pico Island | 74.6°F | 77.2°F | 74.9°F |
| Faial Island | 74.5°F | 77.2°F | 74.9°F |
| Terceira Island | 74.3°F | 76.8°F | 74.3°F |
| Ponta Delgada | 74.2°F | 77.1°F | 75.3°F |
| Sao Miguel | 74.1°F | 76.9°F | 75.3°F |
| Tavira | 73.9°F | 72.4°F | 70.7°F |
| Porto Santo Island | 73.7°F | 74.8°F | 75.9°F |
| Faro | 73.4°F | 72.3°F | 70.2°F |
| Algarve | 73.4°F | 72.3°F | 70.2°F |
| Quarteira | 72.5°F | 71.3°F | 68.2°F |
| Albufeira | 72.3°F | 70.6°F | 67.7°F |
| Portimao | 71.6°F | 69.9°F | 66.9°F |
| Alvor | 71.4°F | 69.5°F | 66.7°F |
| Lagos | 70.8°F | 67.9°F | 65.8°F |
| Lisbon | 70.2°F | 68.3°F | 68.7°F |
| Setubal | 68.4°F | 67.0°F | 67.3°F |
| Sagres | 68.1°F | 63.8°F | 63.6°F |
| Cascais | 65.2°F | 62.6°F | 62.9°F |
| Estoril | 64.7°F | 62.2°F | 62.8°F |
| Sintra | 64.7°F | 62.3°F | 63.1°F |
| Peniche | 64.6°F | 62.5°F | 63.8°F |
| Ericeira | 63.4°F | 61.0°F | 62.8°F |
| Porto | 63.3°F | 61.2°F | 62.0°F |
Charts below show average sea water temperature for Portugal resorts with the warmest sea in August.
You can also check other months of the year to see sea temperature of Portugal resorts at that time.
Places in Portugal:
Name
°F
