Bealham was again a key part of Connacht's squad for the 2015–16 season, being the only player to feature in all 31 of the team's games in the league and in Europe. He started 13 of these games, and scored his first try for the team against Munster on 16 April 2016. On 28 May 2016, Bealham started in the Pro12 Grand Final as Connacht won 20–10 against Irish rivals and reigning champions Leinster to claim the team's first major trophy in their 121-year history.