Port Jackson Sharks will congregate in large numbers in shallow waters in late spring time to mate. Males arrive first in harbours and bays and females usually arrive weeks later. Mating involves biting, with the male grasping the pectoral fin, dorsal fin or flank of the female and rolling her over.
A migratory species, Port Jackson sharks travel south in the summer months to at the end of their breeding season. Males move into deeper water right after breeding, followed by females after egg laying. Females may migrate as far down as Tasmania but it is unclear exactly where the males go. The sharks return each year completing an annual migration to breed in coastal embayments.
Females lay pairs of corkscrew shaped eggs every one to two weeks. As many as eight pairs can be laid during this period. The yolk sack takes up most of the space inside of the egg. Male Port Jackson sharks become sexually mature around 9 years old, and females around 12.