[1][2] The Sydney Sixers entered the season as "hot favourites",[3][4][5] but they lost five consecutive games in the back-half of the tournament and missed out on qualifying for finals for the first time after captain Ellyse Perry sustained a shoulder injury.

[6][7][8] Defending champions Brisbane Heat finished the regular season on top of the ladder, earning the right to host all three playoff matches at Allan Border Field.

[9] The Heat retained their title on 8 December 2019 when they defeated first-time finalist Adelaide Strikers, featuring Player of the Tournament Sophie Devine, by six wickets in the championship decider.

[26][27] This fixturing clash followed a dispute between the BCCI and CA earlier in the year when Australia's top talent (such as Meg Lanning, Ellyse Perry and Alyssa Healy) were excluded from the 2019 Women's T20 Challenge—an exhibition tournament serving as a potential precursor to a future female equivalent of the Indian Premier League.

[28] ESPNcricinfo reported this breakdown was part of a wider disagreement between the two boards that revolved around the BCCI's insistence on CA honouring a touring commitment to play a men's bi-lateral ODI series in India in January 2020.

[69] The Renegades, requiring 28 runs off the last 12 deliveries with only three wickets in hand, pulled off a "great escape"[92] victory against the Sixers through a last-ball six from Courtney Webb against the bowling of Marizanne Kapp.

[102] With 44 runs required from the final 33 deliveries, Carey went on to make 55 not out while a quickfire 29 by Chloe Tryon sealed victory for the Hurricanes with five wickets in hand and ten balls remaining.

A quickfire cameo of 22 off 8 by Georgia Wareham finished the innings promisingly while Dooley, having won a championship with the Brisbane Heat in the previous season, top-scored for the Renegades with 50 not out.

The Heat top-order batters of Maddy Green, Jess Jonassen and Grace Harris then "produced fireworks," collectively scoring 126 runs while only facing 79 balls.

The members of the selection panel were cricket.com.au journalist Laura Jolly, Head of Big Bash Leagues Alistair Dobson, Australian women's cricket team head coach Matthew Mott, former Australian captain Belinda Clark, former players Lisa Sthalekar (Seven Network) and Mel Jones (Fox Cricket) and ABC commentator Alister Nicholson.

Weekly winners are selected over the course of the season by a panel of Cricket Australia officials based on match performance, on-field and off-field attitude, and their demonstration of skill, tenacity and good sportsmanship.

[121] The nominees for the WBBL|05 Young Gun were: Sydney Thunder medium-pacer Hannah Darlington took out the overall award on the back of a standout debut season in which she claimed 16 wickets at an average of 21.31 and economy rate of 6.82.