Dili Coast

The northern coast of Timor-Leste faces the Wetar Strait and, beyond it, the Banda Sea — part of the Indonesian archipelago's complex of inter-island seas that connect the Pacific and Indian Oceans. Dili, the capital, sits on this coast at approximately 8.5 degrees south, backed by steep forested hills that rise abruptly from a narrow coastal plain. The Cristo Rei statue on the eastern headland of Dili Bay is the city's most visible landmark, perched on a hill above the sea and visible from approaching vessels. The tidal regime at Dili is mixed semidiurnal, with a spring range of approximately 1.5 to 2.0 metres and a strong diurnal inequality. The Wetar Strait is part of the Indonesian throughflow — one of the most significant inter-ocean exchanges in global oceanography, transferring warm Pacific water into the Indian Ocean at a rate of approximately 15 million cubic metres per second. This throughflow generates substantial tidal currents in the passages between the islands, and these currents influence the local tidal character at Dili, creating asymmetric flood and ebb durations that differ from simple semidiurnal predictions. Atouro Island, 30 kilometres north of Dili and accessible by public ferry, has achieved international recognition for the density and diversity of its marine life. A 2016 Conservation International reef survey recorded the highest fish diversity ever documented on a coral reef — over 280 species in a single survey area. The reef systems around Atauro are relatively intact, having been spared the intensive fishing pressure that has affected reefs closer to Dili. The ferry crossing takes approximately 3 hours on the public service; the passage between Atauro and Dili has a tidal current of 1 to 2 knots at springs and can be rough in the southeast monsoon (May to October). The eastern coast of Timor-Leste, beyond the Dili area, is remote and largely undived. The Com area on the north coast, near the border with the Indonesian province of West Timor, has reefs that fall within the Coral Triangle — the global centre of marine biodiversity, defined by the triangle between the Philippines, the Moluccas, and eastern Papua New Guinea. Timor-Leste's north coast sits at the southern edge of this zone.