Fifty years and at least 7,200 kilometres later, a postcard has arrived at its destination.

In 1966, 'Chris' decided to send a card from Papeete, Tahiti to Robert Giorgio in Adelaide describing how he was enjoying himself in the humid weather - and said he'd be in touch once he reached England.

Last Monday, Tim Duffy checked the mail at his Wattle Park home and found the postcard underneath a water bill, complete with a 13-franc stamp, The Advertiser reported.

This postcard, sent in 1966, arrived in Tim Duffy's Adelaide letterbox last week

The card was delivered 50 years late but was in surprisingly good condition given its age

Mr Duffy posted this message on social media along with images of the postcard

Slightly faded with a few blotchy marks, it is still in remarkably good condition.

Mr Duffy, who bought the home in 2015 with wife Claire, said: 'It took a while to realise it was an old one.

'There's no way it could have been stored in there (the home's original letterbox) that long; I would say the postman has put it in there.'

The arrival of the card prompted a response from Australia Post.

A spokesman said: 'It is clear something went wrong 50 years ago after the postcard was posted in French Polynesia, and we apologise for the inconvenience,' The Advertiser reported.

Mr Duffy believed his home had been built in 1963 by an Italian man, to whom the card was addressed.

It was thought the card had been printed in the 1950s and showed an idyllic waterfront scene with bush surrounding colonial-era buildings.

The delivery of the postcard and Mr Duffy's comments prompted a response from Australia Post