Just ask Peter Hill and Ron Hooper.

The 92-year-olds met when they both moved into the same retirement village with their wives in 2002.

Living across the street from one another at Levande Ridgehaven Rise in Adelaide's north-east, the couples would see each other as they walked to get a coffee in the morning or at social events.

"Both of our wives got on well together and it developed from there," Peter said.

But when both men lost their wives it only brought the pair closer.

"Ron lost his wife and then I lost mine so we started getting together more and now we see each other at least once every day, if not more," Peter said.

"We just understand each other, have lots of things in common and try to laugh as much as we can."

Their friendship can see them at home watching a history DVD, enjoying a cuppa and custard tart, or at their regular bingo and lunch on a Thursday.

"It's nice to have someone where you're looking out for each other and if anything happens we know we can call on the other," Peter said.

The close-knit neighbours are also part of a bigger group who live in the same street and catch up on Sundays outside someone's house for morning tea - a COVID ritual that transcended the pandemic.

"We all bring a cup of tea and take it in turns to bring something to eat," Peter said.

"You go along because you want to; there's no compulsion to and it keeps you in touch with other people and aware of what's going on around you."

More than a third of Australians report feeling lonely - a statistic Relationships Australia is trying to tackle this Neighbour Day on March 31.

The annual day of action encourages Australians to take everyday steps to build relationships and social connection.

"Research shows us that when people connect with their communities they have a greater sense of belonging," Relationships Australia national executive officer Nick Tebbey said.

Improved mental well-being and reduced loneliness as well as better strength and resilience through tough times were among the benefits, he said.

Levande Ridgehaven Rise village manager Fraser Nimesh said Peter and Ron's close friendship was an example of the benefits of having good neighbours.

"Strong neighbourly relationships not only help residents avoid isolation but also provide a sense of security and peace of mind, reminding us of the importance of good neighbours among local communities," he said.

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