Halai made his Super Rugby debut in Round 1 of the 2013 season when he started on the wing and played all 80 minutes of a 34-20 win over the Hurricanes in Wellington, scoring a try in the process. He ended the season as the Super Rugby leading try scorer with 10,[5] and was third in line breaks with 21, behind his Blues team mates Rene Ranger and Charles Piutau who had 24 each.
On 16 March 2017, Halai leaves Wasps in England for French club Pau in the Top 14 from the 2017-18 season.[6]