The 1989 regular season took place over 22 rounds between 20 April 1989 and 16 September 1989.
The top 6 teams qualified for the finals series.
Updated to match(es) played on 16 September 1989.
Source: NBL.com.au The NBL tie-breaker system as outlined in the NBL Rules and Regulations states that in the case of an identical win–loss record, the results in games played between the teams will determine order of seeding.
3Head-to-Head between Westside Saints and Hobart Tassie Devils (1-1).