"The tour's going really well. It's absolutely incredible. I've spent little time in the South Island so it's like exploring another country," he said.
Mr Sheehan fondly recalled a recent "idyllic" gig on his tour at The Nook in Hawea, where the friendly local community rallied to see the Kiwi artist perform.
Starting his tour at Auckland's Wondergarden Festival on New Year's Eve, Mr Sheehan said New Zealand audiences had not disappointed him and he was looking forward to playing in Napier.
"We've had great audiences. It's been amazing and we're not losing money, which is a really uncommon experience."
Mr Sheehan said those attending the gig should expect a mix of new and old songs; primarily the new tracks featured on his self-described "melancholic" debut album.
The title Drinking With the Birds came from a visual image Mr Sheehan conjured up of a drunken man sitting on a park bench surrounded by pigeons.
"It's quite a dark album and reflects a dark time in my life. It's very inward and reflective," he said.
After finishing his tour at the end of this month, Mr Sheehan said he would embark on another tour through Asia and perform at a "secret concert" held by the global music community, Sofar Sounds, in India.
More information about the Napier show can be found at www.cabana.net.nz.