Sines is a Portuguese city in the district of Setúbal, region of Alentejo and sub-region of Alentejo Litoral with an area of ​​203.30 km 2 and 14,214 inhabitants, Portugal
 
The municipality of Sines is divided into 2 parishes: Porto Covo and Sines, and is limited to the north and east by the municipality of Santiago do Cacém, to the south by Odemira and to the west by the Atlantic Ocean coast. The municipality's coastline to the south of São Torpes is part of the Sudoeste Alentejano e Costa Vicentina Natural Park.

In the area of ​​the municipality since prehistoric times, there are traces of some of these settlements discovered in archaeological stations such as Palmeirinha and Quitéria.

The Celts and Punics also passed through Sines and the Celtic presence is just a hypothesis, but the Punic presence is a certainty: the Gaio Treasury discovered on an estate in the municipality in 1966 and currently in the custody of the Sines Museum is Punic.

During the Roman period, it was defined for the first time as a port and industrial center and the bay of Sines was the port of the city of Miróbriga.

The Pessegueiro Island channel is connected to Arandis (Garvão) under the power of Roma Sines and the Island is an industrial hub with fish salting complexes.

The second hypothesis of the etymology of Sines is also Roman: "sinus" - bay or "sinus" - sinus which is the configuration of Cape Sines seen from Monte Chãos.

The High Middle Ages in which the region was occupied by Visigoths and Moors is the dark period in the history of Sines and there are Visigothic stonework in the Sines Museum that attest to the existence of a 7th century basilica.

The Village of the Order of Santiago from the 13th century acquired administrative autonomy on November 24, 1362.

Dom Pedro I grants Sines a charter to become a town because he was interested in its defensive function on the coast, placing the construction of the Castle as a condition.

In the Modern Age it continues to be marked by maritime functions and the foundation of Porto Covo by Jacinto Bandeira took place at the end of the 18th century with the aim of building two ports.

The 20th century practically begins with the cork industry, fishing and some agriculture and tourism forming the basis of life in Sines until the end of the 60s when, apart from the proximity to the sea, it is little different from the rest of Alentejo.

The attractions are: Sines Historic Center, Sines Castle with the statue of Vasco da Gama, Fort of Nossa Senhora das Salvas (Forte do Revelim), Fort of Pessegueiro Island, Sines Arts Center, Vasco da Gama Beach, Sines Fishing Port, Sines Lighthouse, Sines Museum, Sea Observatory (Sea Museum and Port of Sines), Natural Reserve of Lagoas de Santo André and Sancha and Ilha da Perceveira.

The main ones are: Praia da Costa Norte, Praia da Lagoa, Praia do Canto Mosqueiro, Praia de São Torpes, Praia de Morgavel, Praia de Vale Figueiros, Praia da Fonte do Cortiço, Praia da Costa Norte, Praia da Oliveirinha, Praia da Foz, Praia da Navalheira, Praia dos Canudos, Praia do Areão, Praia da Lagoa, Praia da Pelengana and Praia da Sancha.