East Coast current probably gave a good boost too. Lets see what speed you have going North!
When we were out the other week the EAC was 10s of miles offshore off the central coast.
We had a bit of northerly set up to a few miles offshore. oceancurrent.imos.org.au/product.php
I like that site. I can't quite work out how to read it quantitatively. Still it allows one to work out how the current is behaving. I still like to alter course if I see a fishing float and have a sqiz as we sail by. A few times it has seemed like someone is towing the float along, but that was usually around Port Macquarie to Coffs.