They suffered cuts and bruises and the man lost his front teeth.
The woman also suffered facial injuries and a fractured arm.
They were now spending time in the Bay of Plenty with friends, police said.
"This young couple have showed tremendous fortitude to bounce back from this terrible incident, and when we spoke to them today they said they were happy that the whole of New Zealand had given them so much support,'' detective senior sergeant Greg Standen said.
"They were overwhelmed by the generosity shown by New Zealanders''.
More than 200 emails of support and kind wishes, including offers of gifts, travel and accommodation, had been received through the Victim Support network, Mr Standen said.