[2][3] On 14 January 2013, Arbet left Kalev to join Kavala of the Greek Basket League.

Kavala finished the 2012–13 season last, in 14th place, while Arbet averaged 10.7 points, 3.4 rebounds and 1.3 assists per game.

Arbet won his fifth Estonian Championship in the 2013–14 season, after Kalev swept University of Tartu in the finals, and was named KML Best Defender.

[6] He won his sixth Estonian Championship in the 2015–16 season, after Kalev defeated University of Tartu in the finals, winning the series 4 games to 1 and was once again named to the All-KML Team.

As a member of the senior Estonian national basketball team, Arbet competed at the EuroBasket 2015, averaging 11.6 points, 2.4 rebounds and 0.8 assists in 28 minutes per game.