Porto Alegre (, ; Brazilian Portuguese: [ˈpoʁtu aˈlɛɡɾi, -tw aˈ-], locally [ˈpoɾ-] ⓘ; lit. 'Joyful Harbor') is the capital and largest city of the Brazilian state of Rio Grande do Sul. Its population of roughly 1.4 million inhabitants (2022) makes it the 11th-most populous city in the country and the centre of Brazil's fifth-largest metropolitan area, with 4.1 million inhabitants (2022). The city is the southernmost capital city of a Brazilian state.
Porto Alegre was founded in 1769 by Manuel Jorge Gomes de Sepúlveda, who used the pseudonym José Marcelino de Figueiredo to hide his identity; the official date, though, is 1772 with the act signed by immigrants from the Azores, Portugal.
The city lies on the eastern bank of the Guaíba Lake, where five rivers converge to form the Lagoa dos Patos, a giant freshwater lagoon navigable by even the largest of ships. This five-river junction has become an important alluvial port and a chief industrial and commercial centre of Brazil.
In the late 20th and early 21st centuries, Porto Alegre hosted the World Social Forum, an initiative of several nongovernment organizations. The city became famous for being the first city that implemented participatory budgeting. The 9th Assembly of the World Council of Churches was held in Porto Alegre in 2006. Since 2000, Porto Alegre also hosts one of the world's largest free software events, called FISL. The city was one of the host cities of the 2014 FIFA World Cup, having previously been a venue for the 1950 FIFA World Cup.
History
The official date of the foundation of the city of Porto Alegre is 26 March 1772, by Manuel Sepúlveda, when Freguesia de São Francisco do Porto dos Casais was created and changed a year later to Nossa Senhora da Madre de Deus de Porto Alegre. However, the village started in 1752, when 60 Azorean couples were brought over by the Treaty of Madrid to set up Missions at the Northeast Region of Rio Grande do Sul that was handed over to the Portuguese Crown in exchange for the Sacramento Colony located on the margin of the Plata River. Land demarcation took a long time and the Azoreans settled permanently at Porto de Viamão, which was the first name by which Porto Alegre went.
On 24 July 1773, Porto Alegre became the capital city of the province, when the administration of Manuel Sepúlveda, who used the fictitious name or pseudonym José Marcelino de Figueiredo, to hide his identity, officially started. In 1824, immigrants from all over the world started arriving, especially German, Italian, Spanish, Polish, Jewish, and Lebanese.
The capital city of Rio Grande do Sul is also the capital city in the Pampas region, the name given to the region of fauna and flora typical of the vast plains that dominate the landscape of the southern tip of Brazil, and parts of Argentina and Uruguay, from where the gaúcho comes, the historical figure of a brave warrior who fought legendary battles and wars in the quest to conquer the borders of the kingdoms of Portugal and Spain in the 16th century.
After the declaration of Brazilian Independence in 1822, this was opposed by the inhabitants of the region and they fought a long war for their independence from the Brazilian Empire. The Farrapos War started with the confrontation in Porto Alegre, near the Azenha bridge on 20 September 1835. During the war, the city fell to the rebels and was later recaptured by the Empire. This conflict began the myth of the gaucho who is still praised in songs and celebrated in annual pageants and honored as names of streets and parks.
When the Farrapos War ended, the city continued to develop and underwent strong urban restructuring during the last decades of the 18th century, driven by the accelerated growth of port-related activities and shipyards. Its development continued over time and the city kept abreast with cultural, political and social events that were taking place within Brazil.
The city became known worldwide in 1963 through hosting the World University Games. In 1985, the people of Porto Alegre joined the movement for free elections and one of the largest demonstrations took place in the city.
In 2024, the city and other neighbouring areas were flooded due to heavy rain.
21st Century
Between the late 20th and early 21st centuries, Porto Alegre became one of Brazil's major metropolises, internationalizing its culture, boosting its economy to the point of becoming one of the richest cities in the world, and achieving high levels of quality of life. In 2010, it boasted more than 80 awards and titles distinguishing it as one of the best Brazilian capitals to live, work, do business, study, and have fun. It was also highlighted by the UN that year as the "No. 1 Metropolis in Quality of Life," for having one of the best models of democratic public management and the best Human Development Index among Brazilian metropolises.
The city also stood out for hosting the first three editions of the World Social Forum, in 2001, 2002, and 2003. The third edition attracted 20,763 delegates representing 130 countries, with a total audience of 100,000 people from all over the world. According to Oded Grajew, one of the Forum's mentors, the initiative aimed to denounce the risks of the neoliberal model. The events inspired the creation of similar movements in several countries. The 10th edition of the World Social Forum in 2010 also took place in Porto Alegre. In 2007, Porto Alegre was listed by the consulting firm PricewaterhouseCoopers among the one hundred richest cities in the world, and in 2017 it received the classification of "self-sufficient city" from the Globalization and World Cities Research Network.
However, it experiences the problems that afflict other large urban centers in Brazil, such as the presence of favelas, traffic difficulties, environmental problems, high crime rates, rising cost of living, widening socioeconomic inequalities, and many achievements in the field of participatory and community democracy previously obtained are being lost under new political orientations, including a large reduction in funding, distortion, discrediting, and emptying of the Participatory Budget.
The city
The city is on a delta resulting from the junction of five rivers, officially called Guaíba Lake (popularly mentioned as a river, too). The city dates from the mid-18th century, when colonist from the Azores, islands in the Atlantic Ocean that are part of Portugal, settled in the area, sponsored by the Portuguese colonyimmi. The city was officially established in 1742. Porto Alegre is one of the wealthiest cities in Latin America and one of the most diverse. Its residents includes indigenous Brazilians, Afro-Brazilians, immigrants from Portugal, Russia, Germany, Italy, Spain, Ukraine and Poland. There are also significant Arab and Jewish contingents among its population. The Afro-Brazilian population of the state tends to be concentrated in the city.
Before this, Porto Alegre was the port of Viamão on the shore of Guaíba Lake. Its previous name was Porto dos Casais (Port of the Couples). and it was initially settled by Azoreans. Many families of settlers came from the city of Rio Grande in the littoral Lagunar region, to the south, a military fortress at that time. Today Rio Grande is the most important port of the State of Rio Grande do Sul. The city is also known as "Porto do Sol" (Port of the Sun) and "Cidade Sorriso" (Smile City). More than 70 neighborhoods (see below) are part of the city and two-thirds of the population are concentrated in the Zona Norte (Northern Zone), where most of the economic activity, including the city center, takes place.
Porto Alegre was the seat of the World Social Forum in 2001, 2002, 2003, 2005 and 2010. As the second largest city in southern Brazil, it is an important industrial center in the area. It is also a center for gaúcho (the popular name for natives of the state) history and culture, famous for its churrasco (barbecue) and chimarrão (a strong and hot tea prepared from yerba mate). In 2000, the literacy rate was 97%. The high quality of life is one of the city's main features.
Geography
The city of Porto Alegre is located at the northern end of the large coastal lagoon, Lagoa dos Patos in southeastern Brazil. The city lies on the east bank of the mouth of the Rio Guaiba, the estuary of which forms the enormous freshwater lagoon, Lagoa dos Patos. Also joining the Guaíba at Porto Alegre are the Jacuí River, the Sinos River, the Gravataí River and the Caí River, all tributaries of Guaíba just before it empties into Lagoa dos Patos.
Porto Alegre has a long coastline on the Guaíba Lake, and its topography is punctuated by 40 hills. In the lake, a vast body of water, a maze of islands facing the city forms an archipelago where a unique ecosystem gives shelter to abundant wildlife. The city area concentrates 28% of the native flora of Rio Grande do Sul, with 9,288 species. Among these, there are many trees which are vestiges of the Atlantic Forest. The fauna is also diversified, especially in the islands and hills. The Portoalegrense environs include many parks, squares and tree-lined streets.
Climate
According to the Köppen climate classification, Porto Alegre has a humid subtropical climate (Cfa) characterized by its high variability, but with well-defined seasons and evenly distributed rain throughout the year. The presence of Lake Guaíba contributes to increase the humidity of the air. The city experiences the most prominent difference among seasons and between temperature extremes among all Brazilian capitals. One reason for that is its much more southerly position relative to the rest of the country, which also contributes for the occurrence of 14 hours of daylight in December and 10 hours in June. Due to a large depletion in the ozone layer over the south of Brazil, a result of the Antarctic ozone hole, the population is occasionally dangerously exposed to extremely high UV radiation.
The winter is mild to cool, windy, rainy and quite changeable, which is also a feature of this time of the year. Usual winter temperatures range from 10 °C (50 °F) to 19 °C (66 °F). In the coldest days of the year the temperature may fall slightly below zero, like in 2012, when it recorded −0.7 °C (31 °F). The summers are very hot, with temperatures that go up to 30 °C (86 °F), sometimes reaching 40 °C (104 °F). Sometimes, summer usually has irregular rains and periods of drought. Fall tends to be as changeable as winter, but is typically warmer. Spring is usually very rainy, with thunderstorms, strong winds and hailstorms. The climate of Porto Alegre is very affected by El Niño phenomenon, with flooding in some neighborhoods of the city, especially in the islands in the Lake Guaiba. However, a drainage system and a wall along the Historic District were built after a major flood in 1941 that devastated the city, preventing further damage.
Snow is very rare, sometimes confused with sleet. The only snowfall events in Porto Alegre were in 1879, 1910, 1984, 1994, 2000 and 2006, and few of them featured accumulation. However, frost sometimes occurs in the city. Occurrence of radiation fog is common, causing several delays in early flights. Unlike other large Brazilian cities much further north, notably Brasília, São Paulo, and Rio de Janeiro which receive a pronounced summer maximum in precipitation amounts, Porto Alegre experiences a prominent winter maximum in precipitation values and cloud cover, while the summer season is primarily hot and sunny; though evidently high humidity levels often give a distinct mugginess to the conditions and reduces air quality. According to 1981-2010 averages, Porto Alegre receives an average-total precipitation amount of 1,425 millimetres (56.1 in)Annually. This average makes the city slightly wetter than Rio at 1,172 millimetres (46.1 in) and, to a small extent, drier than both São Paulo at 1,457 millimetres (57.4 in) and Brasilia at 1,557 millimetres (61.3 in), although 1991-2020 normals show annual precipitation figure rising to 1,498 millimetres (59.0 in).
The highest recorded unofficial temperature was 42.6 °C (108.7 °F) and the highest official one was 40.7 °C (105.3 °F), recorded on January 1, 1943, while the lowest official recorded temperature was −4.0 °C (24.8 °F) on July 11, 1918.
Vegetation
Porto Alegre lies in a transitional area between the subtropical forest and the Southern Brazilian grasslands (pampa). A number of conservation programmes have been established to protect native trees. Many of the city's avenues have been planted with different tree species. One striking example of this is Teresópolis Avenue, where bottle trees have been planted. The city is covered in green vegetation and Lapacho and Jacaranda are the main species that can be found locally. The trees from the hills are protected. Two environmental conservation areas can be found in this city: "Delta do Jacuí" (Jacuí Delta) State Park and Lami Biological Reserve.