The season started on 15 September 2012 and took a monthlong break from 21 December to 21 January 2013 due to the 21st Arabian Gulf Cup.
Al-Sailiya were promoted as the 2nd level champions and are back after one season away from the top flight.
[1] Note: Flags indicate national team as has been defined under FIFA eligibility rules.
The decision to increase the numbers of teams means Al Sailiya – who finished bottom of the league – will avoid relegation.
Meanwhile, Muaither – who lost to Al Arabi in the play-offs – will join as the 14th team.