Savea has represented New Zealand on the international sevens circuit. In the 2013 Super Rugby season he joined the Hurricanes after signing a two-year deal.

In November 2013, Savea travelled with the All Blacks to Europe, along with his older brother Julian. This was because “we want to introduce him to the way of the All Black life,” said Coach Steve Hansen. Savea was the first non-playing apprentice to be selected internationally for New Zealand, with future teammates of Savea, Jordie Barrett and Atunaisa Moli, being named as apprentices in 2016 and 2017 respectively.

Although Savea did not play in the Bronze final against Wales due to injury, he was a nominee for World Rugby Player of the Year. Savea eventually lost out on the award to South African flanker, Pieter-Steph du Toit. With Savea’s older brother, Julian Savea, having been a nominee for the award in 2014 and 2015, the Savea brothers became the first set of brothers with nominations for the award. He was also nominated for New Zealand rugby player of the year beating out Beauden Barrett and Anton Lienert-Brown for the title Savea also won Kelvin R Tremain Memorial player of the year.

In 2015, Savea was selected for the All Blacks Sevens squad to play in the Wellington 7s series in January 2016. Savea also became a regular starter for the Hurricanes during the 2015 Super Rugby season, but missed the final due to injury. After injury to Brad Shields, Savea took over as captain of Wellington for the rest of the 2015 ITM Cup season. Savea lead Wellington to the final of the Championship division in the absence of Shields, but Wellington lost the final to Hawke’s Bay’s Magpies, 25-26, with a late conversion from Savea’s Hurricanes teammate Ihaia West.

In 2016, after opting to withdraw from the All Blacks Sevens, Savea was selected in New Zealand’s All Blacks squad for the June test series against Wales. Savea made his debut for the All Blacks, replacing Sam Cane off the bench, on 11 June, against Wales at Eden Park. Savea made a fine debut, with the All Blacks winning 39-21. The following week, Savea scored a try in his second match for New Zealand at the Westpac Stadium, his home crowd. Savea again made his way onto the field by replacing Cane off the bench. The All Blacks won, again, by 36-22.

Savea was retained in the All Blacks squad for the 2016 Rugby Championship and following an injury to Sam Cane, Savea ended up playing 2 of the Rugby Championship tests as openside flanker. In his first start for the All Blacks against South Africa in the 2016 Rugby Championship, Ardie scored a try along with his brother Julian, making them the first brothers in the All Blacks to ever do so in the same test.

With Matt Todd preferred by All Black coach Steve Hansen during tests, Savea only made two appearances on the 2017 end-of-year tour, starting in wins over the Barbarians and a French XV.

Although the 2018 Super Rugby season proved to be a mixed season for Savea, Savea performed well against France during the mid-year Steinlager series, with his performance in the first two tests including an outstanding try. Due to Sam Cane’s ongoing poor discipline, Savea earned a start at openside flanker during the final test of the series, on 23 June 2018. Although the All Blacks defeated France 49-14 in the third test, winning the series 3-0, it proved Savea to be luckless, with Savea coming off injured in the 16th minute, with Matt Todd replacing Savea. Savea missed the 2018 Super Rugby playoffs due to injury.

Savea recovered from his ankle injury in time for the 2018 Rugby Championship, replacing Sam Cane off the bench in both Bledisloe Cup tests against Australia. Savea’s dominance over Australia earned him a start against Argentina’s Los Pumas for round 3 of the competition, on 8 September 2018. Savea lasted the full 80 minutes against Los Pumas, with the All Blacks winning 46-24, but Savea only earned 12 minutes against South Africa’s Springboks the following week. Although Savea only played for 12 minutes during the All Blacks’ 34-36 shock loss to South Africa, he still played well and scored a try.

For round 5 of the 2018 Rugby Championship, with Kieran Read being rested, Savea was scheduled to be used as impact off the bench for the All Blacks as usual, with Luke Whitelock starting at number 8 in Read’s absence, on 29 September 2018. Savea, however, was drafted into the starting lineup only hours before the test against Los Pumas, with Whitelock falling ill. Savea went on to dominate his opposite number 8, Javier Ortega Desio, winning the first “Man of the Match” award of his international career. Savea lasted the full 80 minutes, with the All Blacks beating Los Pumas 35-17. Savea played outstandingly the following week, in the second test against South Africa, when he replaced the injured Sam Cane only 36 minutes into the test. Savea challenged the Springboks well as scored his seventh career try in the final minute. Savea’s try was converted by first-five, Richie Mo’unga, who won the test for the All Blacks through the kick, making the final score a 32-30 win.

His older brother is his former Hurricanes and All Blacks teammate, Julian, who currently plays as a wing for Hurricanes. Savea has Samoan ancestry and is a father-of-one, having married his partner, Saskia, in 2018.

Although the Hurricanes once again failed to progress to the final in the 2019 Super Rugby season, Savea was once again influential for the team, with the likes of former All Blacks, Josh Kronfeld and Sir Michael Jones praising Savea’s consistent performances. Hurricanes teammate, Beauden Barrett, also referred to Savea as the All Blacks’ “most influential player”.

Despite the return of Sam Cane to playing rugby, from his broken neck, Savea was retained in New Zealand’s starting lineup, although at Blindside Flanker, with Liam Squire opting to withdraw from the team. Savea played in four of New Zealand’s five warm-up matches prior to the World Cup in 2019 and was not subbed off for another player in any, including a 92-7 victory over Tonga.