East by West office manager Coralie Christian said the whale "started putting on its show" this morning.
Commuters disembarking the ferry were thanking the crew "and saying how amazing it was", she said.
The harbourmaster told staff about the whale on Tuesday, but hadn't seen it on the ferry trips until today.
Boaties keen to get a glimpse are being asked to keep their distance.
Harbourmaster Grant Nalder said on Tuesday they were making sure all vessels on the water were aware of the whale's presence.
"The advice is to keep clear and give the whale some space."
Niwa marine ecologist Kim Goetz said they had also recorded sounds recently that are thought to be from southern right whales. READ MORE:
• Rare southern right whale spotted in Wellington Harbour
She saidvarious signs have pointed to southern right whales returning to the area.
Delighted Wellingtonians have been posting their photos and videos of the whale on social media.
