Australian overnight ratings for Before the Flood and final ratings for The Witc

Before the Flood has debuted in Australia, averaging 511,000 viewers in the five major capital cities. It was the second-highest rating ABC drama of the day and the nineteenth highest rating program of the day overall. These ratings do not include regional or time-shifted viewers.

Meanwhile, including time-shifted viewers, The Witch's Familiar averaged 734,000 consolidated viewers in the five major capital cities. With 192,000 extra viewers, it was the highest time-shifted program of the day and the seventh highest rating program of the day overall. These ratings do not include regional viewers.