The search for the missing swimmer will continue today until it is too dark, police have confirmed.
If unsuccessful, search teams will return tomorrow in the morning in hopes of finding the missing swimmer at Mount Maunganui.
Earlier in the day, a rescue helicopter joined the search for a person who police said appeared to have gone missing in the water off Marine Parade, in Mount Maunganui.
Police received a report about 10.35am of a person missing in the water, a police spokeswoman said.
"Police are at the scene with Surf Life Saving and Search and Rescue, and a rescue helicopter has been dispatched to assist with the search."