Upvote:2
According to another person who had the same problem like you, yes there is a luggage storage.
Good news is that locker room is available in Canberra and it is affordable and practical. It is located right behind the Murrays counter in Jolimont Centre where coaches stop.
The source also provides pictures of the lockers and prices according to Feb. 2016 (at least an indicator).
Upvote:2
Alas, Murrays no longer has luggage storage, I was directed to Greyhound (same terminal).
For $10 a small bag, or $15 for a large, they'll store it - but only up to just before 6pm when their counter closes. It's in a locked room and is very secure.