Sport Clube Beira-Mar is a Portuguese sports club based in Aveiro, Portugal. Its football team currently plays in the Campeonato de Portugal, the fourth national level, having gained promotion by winning the Aveiro FA First Division 2018/19 championship season. The old Estádio Mário Duarte was the home ground from 1935 until 2019. From 2020, SC Beira-Mar plays home matches at Estádio Municipal de Aveiro. The club also has futsal, basketball, boxing, judo, handball, billiards, athletics, and paintball departments.

Aveiro ( ) is a city and a municipality in Portugal. In 2021, the population was 80,880, in an area of 197.58 square kilometres (76.29 sq mi): it is the second most populous city in the Centro Region of Portugal. Along with the neighbouring city of Ílhavo, Aveiro is part of an urban agglomeration that includes 120,000 inhabitants, making it one of the most important populated regions by density in the North Region, and primary centre of the Intermunicipal Community of Aveiro and Baixo Vouga. Administratively, the president of the municipal government is José Ribau Esteves, elected by coalition between the Social Democratic Party and the Democratic Social Centre, who governs the ten civil parishes.