Raymond Perez, who is visiting from Chile, said he was impressed with the way everyone looked out for each other in the water.
It was "a bit" dangerous, he said.
He wasn't concerned, however, having experience in the water.
"The lifeguards take care of you ... the people who are surfing, they take care of you as well," he said.
The problem with swimming in the water with such big waves was that the waves didn't bring people straight back to shore, Perez said.
Rather, they swept them in a circular motion and along parallel to the beach, so swimmers became disoriented.
"It moves you side-to-side," he said.
Surf Life Saving patrol captain at Mount Maunganui Main Beach Jo Parry said they had "remained vigilant" throughout the day. They had patrolled the beach, talking to people who were in the water and warning them about the dangers, she said.