The Portimão circuit is distinguished by its strongly undulating terrain, which produces an unusual sequence of crests, blind corners, and elevation changes. Commentators have drawn comparisons to older versions of the Nürburgring and Spa-Francorchamps, both circuits known for their topographical variety. The layout features significant downhill slopes and right-hand turns after the main straight, and its width is considered generous by contemporary standards, providing multiple overtaking opportunities. Earl Bamber, driving in the circuit's early A1 Grand Prix round, described it as a roller coaster ride reminiscent of old-school circuit design.
The development complex around the circuit includes a karting track, an off-road track, a technology park, a five-star hotel, a sports complex, and residential apartments.
The circuit opened for competition with the final round of the 2008 World Superbike Championship on 2 November 2008. In its early years it attracted Formula One test sessions involving McLaren, Honda, Ferrari, and Toyota — Toyota running its new TF109 chassis there in January 2009. The circuit also staged the final round of the 2009 GP2 Series season and was confirmed for the A1 Grand Prix series in 2009.
In 2010 the circuit began hosting a round of the FIA World Touring Car Championship, a relationship that continued intermittently through the following decade.
The circuit's Formula One debut came under extraordinary circumstances. Due to the restructuring of the 2020 season caused by the COVID-19 pandemic, the Algarve International Circuit hosted the 2020 Portuguese Grand Prix in October of that year, marking the first time a Portuguese Grand Prix had been held since the 1996 race at the Estoril circuit. The 2021 Portuguese Grand Prix followed, held from 30 April to 2 May that year.
In December 2025 it was announced that the circuit would return to the Formula One calendar for the Portuguese Grand Prix in 2027 and 2028, replacing the Dutch Grand Prix at Circuit Zandvoort.
The circuit held its first Portuguese motorcycle Grand Prix in November 2020 as part of the pandemic-revised MotoGP calendar. A second MotoGP event, named the Algarve Grand Prix, was held at the circuit in November 2021. The circuit also hosted a round of the FIM Women's Motorcycling World Championship and regularly stages the Superbike World Championship and Supersport World Championship rounds.
In September 2022, a fatal accident occurred during the Supersport 300 World Championship Race 1 at Portimão, when rider Victor Steeman suffered injuries that proved fatal.
The Algarve International Circuit hosted the 8 Hours of Portimão in 2021 as a replacement for the 1000 Miles of Sebring, which was moved due to pandemic scheduling constraints. The circuit returned to the WEC calendar with the 6 Hours of Portimão in 2023.
A statue at the circuit honours Craig Jones, a World Supersport rider who died following a crash at Brands Hatch in 2008. The monument, incorporating an architectural arrangement of the main access roundabout, was created by Paula Hespanha and architect Manuel Pedro Ferreira Chaves and represents Jones on his motorcycle crossing the finish line. One of the circuit's corners was named after Jones. The monument forms part of a larger landscape sculpture representing the circuit's main straight, extending toward the main grandstand car park.
The Portimão circuit was the location of the opening episode of The Grand Tour, titled "The Holy Trinity," filmed in 2016.
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