The Portugal resorts with the warmest sea water temperature in May are Madeira, Funchal and Canico.
Below you can see a list of all popular Portugal resorts and information about sea water temperature in May for the last two years.
| Resort Name | May 2025 | May 2024 | May 2023 |
|---|---|---|---|
| Madeira | 70.4°F | 70.9°F | 71.7°F |
| Funchal | 70.4°F | 70.9°F | 71.7°F |
| Canico | 70.0°F | 70.7°F | 71.6°F |
| Porto Santo Island | 68.8°F | 70.2°F | 70.7°F |
| Santa Maria Island | 66.8°F | 68.8°F | 68.2°F |
| Faro | 66.1°F | 63.2°F | 66.5°F |
| Algarve | 66.1°F | 63.2°F | 66.5°F |
| Lisbon | 65.4°F | 64.2°F | 65.6°F |
| Quarteira | 65.2°F | 62.2°F | 65.6°F |
| Tavira | 65.2°F | 61.9°F | 65.9°F |
| Ponta Delgada | 65.0°F | 67.0°F | 66.8°F |
| Sao Miguel | 65.0°F | 66.7°F | 66.4°F |
| Setubal | 64.9°F | 63.3°F | 64.7°F |
| Flores Island | 64.9°F | 66.6°F | 65.2°F |
| Corvo Island | 64.8°F | 66.7°F | 65.3°F |
| Sao Jorge | 64.7°F | 67.2°F | 65.4°F |
| Albufeira | 64.7°F | 61.5°F | 65.3°F |
| Faial Island | 64.6°F | 66.6°F | 65.2°F |
| Graciosa | 64.6°F | 66.8°F | 65.2°F |
| Pico Island | 64.5°F | 66.6°F | 65.2°F |
| Portimao | 64.0°F | 61.1°F | 64.7°F |
| Alvor | 64.0°F | 61.1°F | 64.6°F |
| Terceira Island | 63.8°F | 66.1°F | 65.0°F |
| Lagos | 63.7°F | 61.0°F | 64.0°F |
| Sagres | 63.4°F | 61.1°F | 63.3°F |
| Cascais | 63.1°F | 61.2°F | 62.0°F |
| Sintra | 63.0°F | 61.2°F | 62.0°F |
| Estoril | 62.9°F | 61.0°F | 61.8°F |
| Peniche | 62.9°F | 61.0°F | 61.8°F |
| Ericeira | 62.5°F | 60.7°F | 61.7°F |
| Porto | 61.9°F | 59.5°F | 60.4°F |
Please see following sea water temperature averages charts for the warmest Portugal resorts in May.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
Portugal Resorts:
NAME
F°
| Albufeira |  |
+58 |
| Algarve |  |
+60 |
| Cascais |  |
+62 |
| Faro | |
+60 |
| Funchal |  |
+54 |
| Lagos | |
+62 |
| Lisbon | |
+62 |
| Madeira | |
+54 |
| Ponta Delgada | |
+66 |
| Portimao | |
+60 |
| Porto | |
+54 |
| Porto Santo Island | |
+64 |
| Quarteira | |
+58 |
| Sao Miguel | |
+66 |
| Terceira Island | |
+64 |
