Tam Giang Lagoon is located in the coastal region of Central Vietnam, specifically the northern part of the Tam Giang - Cau Hai lagoon system – the largest brackish water lagoon system in Southeast Asia. The geographical position of the lagoon is centered at coordinates approximately 16°37′55″N 107°28′19″E. It stretches in a West-Northwest - East-Southeast direction, from the mouth of the O Lau River (north) to the mouth of the Huong River (south), bordering Quang Dien, Phong Dien, Phu Vang districts, and Huong Tra town.
Tam Giang Lagoon is about 15-30 km from the center of Hue city depending on the specific destination (for example, Chuon Lagoon is about 15 km from Hue). Situated along the East Sea, it is an intersection of rivers and the sea, creating a complex hydrological system with narrow river mouths and whirlpools. This not only creates natural beauty but also contributes to a diverse ecosystem, supporting the livelihoods of thousands of local fishermen.



