Cape Arnhem – Wanuwuy to the Yolŋu – is the eastern extremity of the Gove Peninsula, where the Arafura Sea meets the Gulf of Carpentaria. It is a place of great cultural significance and one of Dhimurru's special-permit recreation areas, reached by a rough 4WD track or by sea. Visitors come for its beaches, turtle nesting, fishing and remote coastal scenery.

The cape was named in the regional brief for this project as a Gove dive area, but no dive-specific description has been published. It is included on the basis of its geography and its place in the Gove recreational permit system, and should be regarded as an exploratory location.

From the regional pattern around Gove, divers can expect rocky reef and coral patches along the cape and nearby islets, with Gulf-of-Carpentaria clarity (often better than the western Top End) and a mix of reef fish – coral trout, cod, sweetlips, parrotfish – and pelagics such as trevally, queenfish and mackerel around the points. Turtles are abundant, and manta rays, dolphins and occasionally whale sharks have been reported in Gove waters.

The cape faces straight into the south-east trade wind, which makes it rough for much of the dry season; the calm windows of the build-up (October–December) are the most realistic time to dive. It suits experienced, self-sufficient divers with a capable boat and local knowledge who are prepared to explore with no established site information and to operate under Dhimurru permit conditions. Anyone who does dive here should share positions and conditions with local divers, as the cape remains effectively undocumented underwater.

Cape Arnhem (Wanuwuy) is reached from Nhulunbuy by 4WD track (dry season) or by boat. Land access requires a Dhimurru special permit charged at a daily rate, in addition to the general On-Country Pass. By sea, launch at the Gove Boat Club ramp and run south-east down the exposed eastern coast – a long trip only feasible on calm days.

There are no facilities at the cape; be self-sufficient.

The Gove Peninsula sits at the north-west corner of the Gulf of Carpentaria, and tidal ranges here are much smaller than at Darwin (roughly 2–3 m), so diving is less tide-bound – but slack water still matters at channel and point sites. From April to September the south-east trade wind blows hard (often 15–25 knots), making the exposed east-facing coast and offshore islands rough by late morning; early starts and sites in the lee of islands are the norm. The build-up and early wet (October–December) bring glassy calm days and the best visibility.

In the wet season (December–March) the Gulf side is often still diveable, but inshore sites lose visibility after rain, cyclones are possible and box jellyfish are present.

Pick a sheltered reef or rock ledge in the lee of the cape on a calm day, anchor in sand and dive at 8–15 m, staying close to the anchor line. Use an SMB and keep dives conservative given the distance from help.

Gove Diving & Fishing Charters (Nhulunbuy, ph 08 8987 3445) has provided air fills, gear hire, courses and boat trips to the offshore islands; confirm current operation before travelling. Otherwise private boats from the Gove Boat Club ramp, and local residents' informal dive groups.