As a general rule, you are able to drive in Australia, as a visitor, on your existing driving licence for a maximum of three months after arriving in Australia. However specific rules do vary across each state, as detailed below.
Even if you do not intend on driving whilst overseas it is strongly recommended you purchase an International Driving Permit (IDP). This is a special permit established for travellers, which allows motorists to drive in overseas countries without testing as long as their driver’s licence is valid. Another benefit of an IDP is that it is authorised by the United Nations and is recognised in over 150 countries world-wide. An IDP can also be used as an additional form of identification whilst travelling. A large portion of car rental firms will also require an IDP before an agreement is reached. Applications for an IDP should be available from your local Post Office.