In May warmest sea in Portugal is usually observed in the following locations: Madeira, Funchal, Porto Santo Island.
Table below shows the average sea water temperature for marine resorts of Portugal in May for the last three years.
| Place name | May 2026 | May 2025 | May 2024 |
|---|---|---|---|
| Madeira | 65.4°F | 68.3°F | 68.8°F |
| Funchal | 65.4°F | 68.3°F | 68.8°F |
| Porto Santo Island | 65.1°F | 66.9°F | 68.2°F |
| Canico | 65.0°F | 68.0°F | 68.6°F |
| Lisbon | 63.2°F | 63.9°F | 62.8°F |
| Faro | 62.8°F | 64.5°F | 61.9°F |
| Algarve | 62.8°F | 64.5°F | 61.9°F |
| Setubal | 62.6°F | 63.4°F | 62.0°F |
| Tavira | 62.5°F | 63.7°F | 60.7°F |
| Santa Maria Island | 62.4°F | 65.1°F | 66.9°F |
| Quarteira | 62.3°F | 63.7°F | 61.0°F |
| Albufeira | 62.0°F | 63.2°F | 60.3°F |
| Portimao | 61.8°F | 62.6°F | 60.0°F |
| Alvor | 61.8°F | 62.6°F | 60.0°F |
| Ponta Delgada | 61.6°F | 63.5°F | 65.3°F |
| Sao Miguel | 61.5°F | 63.5°F | 65.1°F |
| Lagos | 61.5°F | 62.3°F | 59.9°F |
| Porto | 61.5°F | 60.7°F | 58.6°F |
| Corvo Island | 61.5°F | 63.3°F | 65.1°F |
| Flores Island | 61.4°F | 63.4°F | 64.9°F |
| Faial Island | 61.3°F | 63.1°F | 64.9°F |
| Cascais | 61.2°F | 61.8°F | 60.1°F |
| Pico Island | 61.2°F | 63.1°F | 64.9°F |
| Sintra | 61.1°F | 61.7°F | 60.1°F |
| Estoril | 61.0°F | 61.6°F | 59.9°F |
| Sagres | 61.0°F | 62.1°F | 60.0°F |
| Sao Jorge | 61.0°F | 63.2°F | 65.4°F |
| Peniche | 60.8°F | 61.6°F | 59.9°F |
| Terceira Island | 60.7°F | 62.4°F | 64.5°F |
| Ericeira | 60.6°F | 61.2°F | 59.6°F |
| Graciosa | 60.5°F | 63.1°F | 65.1°F |
Charts below show average sea water temperature for Portugal resorts with the warmest sea in May.
You can also check other months of the year to see sea temperature of Portugal resorts at that time.
Places in Portugal:
Name
°F
