How warm is Lisbon Riviera water in spring? In April sea water temperature throughout Lisbon Riviera is not yet warm enough for swimming and does not exceed 20°C. Based on average water temperature observations over the past ten years, the warmest sea in Lisbon Riviera in April was 15.5°C (in Paco de Arcos), and the coldest water 15.1°C (in Sintra). To find out the sea temperature today and in the coming days, go to Current sea temperature in Lisbon Riviera
Lisbon Riviera cities and resorts with the values of the average water temperature in April in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.
To find out what the water temperature was in Lisbon Riviera any day over a period of the last ten years, select the month