"Everybody moved towards the edge of the shore and took their phones out to video it. Others threw off their clothes and were running into the water so they could go swimming with them - it was kind of funny.
"But I was pleasantly surprised that people were so respectful and didn't go out to try and join them but stood waist deep in the surf and let the dolphins come to them. They are pretty amazing."
Miller said the dolphins stayed for about 5-10 minutes before moving off.
Being from Alaska, she said her family were only used to seeing smaller Dall's Porpoise.
"So it was really cool. It was kind of a nice blessing for the New Year."
Mount Maunganui Lifeguard Service head lifeguard Julia Conway had been setting up the red and yellow flags when she spotted a dolphin in the waves.
"Then I scanned my eye across and there were another three jumping across," she said.
"It was pretty exciting."
Conway said crowds of people formed, watching the marine creatures frolic and interact with swimmers and surfers.
"I think there were more than 10, there were quite a few jumping up with the surfers."
Conway said some people at the beach went into the shallows to get closer but were well behaved and still kept their distance.
Many of the lifeguards were on alert for potential marine visitors following two orca seen at Mauao yesterday. "We've been looking out for them again."
What appeared to be a mother and calf were spotted on Sunday morning hunting stingray close to the shore in Pilot Bay, a popular spot for swimmers and kayakers.
