Dive Kapiti owner Craig Hipson also witnessed a similar account, after a small pod of around six orca rested in Plimmerton last Wednesday, which he said included a prominent female sticking close to the shore.
"Every three to four months these spectacular mammals return to Kapiti's shores because they circumnavigate New Zealand," Mr Hipson said.
"In the past I've been lucky enough to see them when conducting dive courses, but it's still a pretty rare occurrence."
Orca whales are recognised for their distinctive black and white markings, where no two are the same, and their prominent large dorsal fin.
The Department of Conservation stated that 150 to 200 orcas are currently living in New Zealand's coastal waters, with the protected species' appetite for stingrays bringing them to shallow, muddy waters to dig.