Yes, you need an Australian Visa (or ETA) when traveling for tourism purposes.
Your ETA is good for 3 months of traveling in Australia. The total cost is $20 USD per person.
It’s valid for one year from the date of purchase or until your passport expires, whichever is sooner.
If it has been longer than one year since you purchased an ETA, you will need to reapply for a new one.
You can apply here, we deliver within 24 hours: