Praia do Vale de Centeanes is where you'll want to go to see some of the clearest water in the Algarve. On a clear day, it's easy to see the bottom of the ocean without even setting foot in the water. This beach is located near Carvoeiro, so it won't be hard to travel from here to Praia da Marinha or Praia de Benagil.
Some popular Algarve beaches where you might find particularly pleasant water temperatures include: Praia da Rocha: This beach in Portimão is renowned for its warm waters and large stretches of sand. Very popular in summer, it takes its name from the rocks between the cliffs and the sea.
The Portuguese coastline – along with the coastlines of California, South Africa, Western Australia and Peru – is subject to a phenomenon known as upwelling. In simple terms, if the wind blows parallel to the coast, then water from the bottom of the ocean (cold and rich in nutrients) rises and comes to the shoreline.
Praia dos Coelhos, SétubalThe setting for innumerable films and advertising campaigns, this idyllic, secluded beach on the Arrábida coastline boasts some of the clearest waters you'll likely ever swim in. Though increasingly on the tourist trail, it's still relatively crowd-free.
Top beaches include Praia da Prainha and Praia do Porto do Seixal, a gorgeous black sand beach surrounded by vibrant green mountains. Just remember to set aside time for exploring Madeira's natural swimming pools.
But though Nazaré's surfing reputation precedes it, there are plenty of calmer beaches suitable for swimming, including Praia da Nazaré and São Martinho do Porto.
The most common sightings in Portugal include the big Calpean jellyfish (Rhizostoma luteum), which is a large type of barrel jellyfish with a bell (head) up to 60cm in diameter; The Compass Jellyfish (Chrysaora hysoscella), usually spotted off the south coast (Algarve); The Jelly Blubber (Catostylus tagi), another ...
The sea temperature is about 20 degrees, which is perfect for swimming and surfing. July is a busy season with international and national tourists all traveling down to the coast of the most beautiful region of Portugal.
Both countries have Mediterranean climates, meaning they are generally temperate, with warm summers and mild winters. In Portugal, the average temperature in Lisbon is 24°C in July and 11°C in January, and in Spain the average temperature in Barcelona is around the same: 24°C in August and 10°C in January.
The graph below shows the range of monthly Albufeira water temperature derived from many years of historical sea surface temperature data. The warmest water temperature is in September with an average around 70°F / 21.1°C.The coldest month is March with an average water temperature of 60.6°F / 15.9°C.
Both countries have Mediterranean climates, meaning they are generally temperate, with warm summers and mild winters. In Portugal, the average temperature in Lisbon is 24°C in July and 11°C in January, and in Spain the average temperature in Barcelona is around the same: 24°C in August and 10°C in January.
Although it may be too cold to swim, visiting beaches in the Algarve in winter is still tons of fun. The beaches are gorgeous, and on sunny days, you can still plop down to enjoy the sunshine in the sand.
The water temperature in the Algarve in November is generally too cool for swimming. The average sea water temperature in November is around 18°C (64°F), which is significantly cooler than the summer months when the average sea temperature can reach temperatures of 25°C (77°F) or higher.