This situation led to the hoisting of the red flag and the posting of warnings at the accesses to this beach in the district of Porto, said Silva Rocha.

This information is also on the official website of the Portuguese Environment Agency (APA).

Also on Tuesday, the beach of Castelo do Queijo, in Porto, had bathing banned for the same reason, according to the National Maritime Authority (AMN).

“Castle do Queijo beach, in the municipality of Porto, was today closed to bathing after water quality analysis carried out by the Portuguese Environment Agency revealed microbiological values ​​above the reference parameters, and the water was unsuitable for bathing”.

Last week, also in the district of Porto, and due to microbiological values ​​above the reference parameters, five beaches in Vila Nova de Gaia and one in Póvoa de Varzim had swimming banned.

Further south, in the district of Aveiro, five beaches were closed in Espinho.