All overseas arrivals into Australia must self-isolate for two weeks in an attempt to stop the spread of coronavirus.
Prime Minister Scott Morrison also said Australia will ban cruise ships from foreign ports.
The announcement follows New Zealand’s lead, with New Zealand Prime Minister Jacinda Ardern earlier announcing all travellers to New Zealand will have to be quarantined for 14 days upon entry into the country.
The restrictions apply to all countries except for Pacific nations, and also includes any New Zealand citizens or residents returning to the country.
“Alongside Israel and a small number of Pacific islands who have effectively closed their borders, this decision will mean New Zealand will have the widest ranging and toughest border restrictions of any country in the world,” Ardern said.
“We are also encouraging New Zealanders to avoid all non-essential travel overseas. This helps reduce the risk of a New Zealander bringing COVID-19 back with them.”
All cruise ships are banned from going to New Zealand until June 30.
“As of midnight tonight, we’re issuing to all cruise ships not to come to New Zealand until at least June 30, that is for incoming cruise ships, at which time the directive will be reviewed,” she said.
The announcement came as a planned memorial in Christchurch for the victims of last year’s mosque shooting was cancelled.
“This a pragmatic decision,” Arden said. “We’re very saddened to cancel, but in remembering such a terrible tragedy, we shouldn’t create the risk of further harm being done.”