Cape Brett / Rakaumangamanga – Northland & Bay of Islands

Site Overview

Cape Brett, also known by its Maori name Rakaumangamanga, is one of the most dramatic headland dive sites in New Zealand, where sheer rocky walls drop into deep water and strong currents bring nutrient-rich water that supports an extraordinary diversity of marine life. The walls are covered in gorgonian fans, soft corals, and colourful sponge gardens that thrive in the current-swept environment. Schools of kingfish and trevally patrol the blue water, numbering in the hundreds during the autumn months when baitfish are abundant. Stingrays glide along the rocky reef at mid-depths, while bronze whaler sharks make seasonal appearances from summer to autumn, adding big-animal excitement to the reef diving. The exposed position of Cape Brett means that conditions are weather-dependent, but when the seas are calm, the diving here is among the best in Northland. The headland creates a unique underwater topography with pinnacles, gutters, and overhangs that provide shelter for diverse marine species. Multiple dive sites exist along the cape, allowing operators to select the best location based on current direction and conditions. The combination of dramatic geology, abundant pelagic life, and seasonal shark encounters makes Cape Brett an essential dive for visitors seeking the full Northland experience. The exposed position of the cape ensures that conditions change with wind direction and tidal state, creating a dynamic diving environment that rewards attentive observation and flexible planning.