Can you swim in Portugal in summer? In August sea water temperature in some cities of Portugal is above 20°C and it is enough for comfortable bathing. Based on average water temperature observations over the past ten years, the warmest sea in Portugal in August was 23.8°C (in Flores Island), and the coldest water 16.6°C (in Viana do Castelo). To find out the sea temperature today and in the coming days, go to Current sea temperature in Portugal
Several popular Portugal resorts with average ocean temperatures in August over the past years. For sea temperatures in other locations, select a state below or search
For the searchability, all Portugal cities and resorts are separated by state. To find the temperature of the water, select the state and then the city. If you do not know in which state the place is of interest to you, go to the section Portugal all cities and resorts
To find out what the water temperature was in Portugal any day over a period of the last ten years, select the month