Shark Bay on Bathurst Island offers a diverse underwater landscape featuring reef, wall, and cave formations. Divers can expect depths ranging from 10 to 23 metres, with an average depth of 18 metres. Access to this site is by boat only, and the area is subject to moderate currents. Water temperatures remain warm throughout the year, typically between 27C and 31C. Due to the presence of significant hazards, including sharks, strong currents, saltwater crocodiles, and seasonal box jellyfish, this site is recommended for intermediate divers. Divers should arrive self-sufficient with all necessary equipment as on-site facilities are not confirmed.

The Tiwi Islands, located off Bathurst Island, feature shallow reef environments suitable for beginner divers. Access to these sites is exclusively by boat, with mild currents that vary according to tidal shifts. Water temperatures remain warm throughout the year, ranging from 27C to 31C. Visitors should be aware of potential hazards, including the presence of saltwater crocodiles in Northern Territory waters and a stinger season for venomous box jellyfish from October to June. Visibility at these reef sites is variable, and conditions can change between visits. It is recommended to consult with local boat operators regarding current conditions and jellyfish forecasts before planning a trip.

Lethbridge Bay Reefs, located off Melville Island, is a challenging marine site requiring boat access. The area is defined by significant tidal movements, with ranges between 1.5 and 8 metres, resulting in strong rips and sweeps. Divers must navigate these variable currents and exercise extreme caution due to the presence of saltwater crocodiles, which are a constant danger in these coastal waters. Box jellyfish are also prevalent, particularly between October and May. Given these environmental hazards, the site is suited for advanced divers only. Water temperatures remain warm throughout the year, ranging from 27C to 31C.