Arnhem Bay is a coastal estuary located in East Arnhem Land, Northern Territory, Australia. It is a significant body of water within the broader marine environment of the Arafura Sea. The bay is situated near the Indigenous community of Nyinyikay and is within the region of Gove and Nhulunbuy. Access to the water for paddlers is primarily via boat ramps, with a high-capacity triple-lane concrete boat launch ramp in the area. Other potential access points for boat launching are located at Dhälinybuy, Bukudal, and Garrthalala. The area holds deep cultural significance, with references to sacred sites and creation stories, such as those depicted by artist Mawalan Marika, and stone picture sites are located at Hardy Island within the bay. The region is part of Arnhem Land, which requires permits for visitors, indicating that paddlers must secure appropriate permissions before accessing the area. The bay experiences significant tidal influence as part of a navigable tidal river system extending into it, meaning paddlers must plan for strong tidal currents. The marine environment supports wildlife including barramundi and Port Jackson sharks. The aesthetic is that of a remote tropical estuary, with mangrove creek systems noted along its shores. Given its exposure to the Arafura Sea, paddlers should expect potential for wind and open water conditions within the bay.