Can you swim in the ocean in Portugal?

In fact, the waters of Portugal's coasts are rather cold compared to those of the Mediterranean Sea. A period of mental and physical preparation is necessary to enjoy a swim in the waters of the beaches of Portugal. However, there are some places where the temperature of the water is warmer and warmer.



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The warmest water temperature is in September with an average around 67.8°F / 19.9°C. The coldest month is March with an average water temperature of 59°F / 15.0°C.

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Beaches in the Algarve are generally safe although in some areas due to sea erosion cliffs can be unstable.

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Portugal is very highly ranked on the list of Europe's top beach destinations with 432 of the country's beaches and marinas currently flying the coveted Blue Flag for cleanliness and quality.

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Praia da Dona Ana, near Lagos in the Algarve, is a stunning beach renowned for its clear waters and striking cliffs.

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Portugal's beaches are beautiful, yes–but due to being set on the Atlantic, the water is actually much colder than many visitors might expect (yes, even in the Algarve). What is this? Spain's long Mediterranean coast, on the other hand, tends to offer much warmer water and a longer swimming season.

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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.

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Dogs and other pets are not permitted to be circulating outside specific areas as well as the deposit or abandonment of any waste, glass objects or blunt material outside the proper receptacles is highly prohibited on Portuguese beaches.

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The high season – June to August – is the best time for the beach. During the summer months, you'll find warmer ocean temperatures, especially as you head south to the Algarve. Water temps and crowds alike peak in July and August, so plan on sharing those pretty beaches with plenty of other sunseekers.

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Whether you have an upcoming trip booked or are looking for travel inspiration, keep scrolling to see the best beaches in Portugal.
  • Praia Dona Ana, Lagos.
  • Costa da Caparica, Almada.
  • Praia Porto Santo, Porto Santo Island.
  • Praia de Moledo, Moledo.
  • Praia da Falesia, Albufeira.
  • Praia de São Jacinto, Aveiro.


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You can swim in the ocean comfortably from March until October. And in the winter months, you can take long refreshing beach walks. Find out what the weather in the Algarve is like from January until December.

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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.

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Algarve is the hottest region of Portugal, with the exception of Madeira Island (an archipelago of Portugal). In the Alentejo region the average temperatures are around 16ºC (depending on if you are on the coast or in the interior) and in the Algarve region 18ºC.

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The water is safe for swimming in the lagoon, but it is also a very popular area for various water sports – jetskis in particular. The beach on the seaward side is a magnificent long stretch of golden sand. It is flat and easily accessible from the paved promenade that runs behind the beach.

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