But whatever happens on the rugby field, on the beach there's no chance of him joining girlfriend Johanna O'Connor's Mount Maunganui club.
"I'd get disowned - it would be sensational!" Morrison, who has now got 11 national titles, laughed. "I've raced with the same guys at Mairangi Bay for about 10 years and have been with the club since I was seven so I don't think I'll be moving far."
Morrison only got into the oval-ball code as a way of killing time between surf seasons but he admits his priorities have had to change.
"I used to be a surf athlete who played a bit of footy and a kayak paddler who played a bit of footy but my attention to training in surf lifesaving has definitely wound down a bit now.
"I don't put the effort in as I used to - I probably put as much effort into my rugby now as I used to in surf lifesaving."
Morrison joins a short list of top rugby players with recent surf background. Former All Black Mark Robinson was a noted beach sprinter, as is Bay of Plenty wing Charles Baxter, while Auckland halfback David Gibson and Morrison have crossed paths on the beach in the past.
Morrison grew up on the beach, linking with North Shore's Mairangi Bay when his family shifted back there from Taranaki when he was seven, and has been sifting sand out of his hair ever since.
But his rugby pedigree burns equally strong. His grandfather was 1938 All Black Tom Morrison, later an All Black selector from 1950-56 and chairman of the NZRFU from 1962-68.
His dad Grant is a long-time sports journalist and much-respected figure in surf lifesaving circles, who often fills in as the sideline eye for radio commentaries in Auckland.
Morrison Jnr came through the age grades at North Harbour, playing for North Harbour secondary schools out of Rosmini College, alongside All Black Tony Woodcock. But his surf career meant rugby was only ever on the sidelines until he moved to Whangamata with work two years ago and joined the local club side.
After dabbling in the Swamp Fox jersey early on, he quickly realised his lithe surf frame might have to get some extra padding to handle first-class rugby.
"You probably can become a little too bulky through rugby, although having said that, if there's a rough day or a strong wind that requires a bit more strength, that's where you can get an advantage over some of the sleeker, smaller surf guys around."
* Bay of Plenty Rugby has filled some of the void left by departing locks Bernie Upton and Mark Sorenson, signing 22-year-old Culum Retallick from Canterbury. He played for the Canterbury development team this year and has spent three years in the union's academy.