Originally Posted by
SilverTP
There are showers available for arriving international passengers once they are landside. From Auckland International Airport website (link cited above):
I think by no showers on arrival they were referring to a Air NZ lounge.
of course the OP could go to domestic, through security to the Dom lounge, have a shower and then exit the lounge via the 'regional flights' exit and head in to town, if they were desperate for a shower in the Air NZ lounge.