At least 19 ships are anchored outside the Tauranga Harbour with another three en route to the Port of Tauranga as disruption to the international supply chain is creating a "relentless" flow of cargo.
Ship Finder, a live marine tracking website, shows 19 vessels anchored from the harbour entrance along the coast towards the Coromandel, while another three vessels are on route, located off the coast of Whakatāne.
A Port of Tauranga spokeswoman said the backlog was a result of ongoing disruption to the international supply chain.
"There is also still congestion and reduced capacity at Ports of Auckland, so we are handling large volumes of diverted import and export cargo."