The New Zealand Breakers won the 2012–13 NBL championship, beating the Perth Wildcats 2–0 in the Grand Final series. The NZ Breakers finished top of the regular season at 24–4, so took the double; eight clubs played 28 games each.
Ben Madgen (Sydney Kings) led the league in scoring with 18.2 points a game. Daniel Johnson led in rebounds (8.1 a game) and Cedric Jackson in assists (6.8). The season's best single-game score was Adris Deleon's 34 points for the Wollongong Hawks against the NZ Breakers on 17 January 2013. The biggest win was the Perth Wildcats' 34-point defeat of the Sydney Kings, 95–61.
| # | Team | P | W | L | +/- |
|---|---|---|---|---|---|
| 1 | NZ Breakers | 28 | 24 | 4 | +226 |
| 2 | Perth Wildcats | 28 | 22 | 6 | +310 |
| 3 | Wollongong Hawks | 28 | 13 | 15 | +17 |
| 4 | Melbourne Tigers | 28 | 12 | 16 | -71 |
| 5 | Sydney Kings | 28 | 12 | 16 | -120 |
| 6 | Cairns Taipans | 28 | 11 | 17 | -63 |
| 7 | Townsville Crocodiles | 28 | 10 | 18 | -179 |
| 8 | Adelaide 36ers | 28 | 8 | 20 | -120 |
Marked: the teams that played finals. Ordered by wins, then points difference; the league's own tiebreakers aren't applied.
New Zealand Breakers, who beat the Perth Wildcats 2–0 in the Grand Final series.
The NZ Breakers, with a 24–4 record in the regular season.
Ben Madgen, with 18.2 points a game over 30 games.
Every champion since 1979: NBL champions. All seasons on file: the NBL archive.