Once an individual reaches the age of 16, they can legally consent to sexual activity with a legal adult who is 18 years of age or older.

Can a 16 year old date a 20 year old in WA?

In general, there are no laws that say when a young person can start dating another person (but there are laws about doing sexual activity with another person, which we explain below!) However, there are laws which make grooming children under the age of 16 a crime.