Waterways define the geography and accessibility of Campbell Bay.
* **Andaman Sea & Indian Ocean:** The town sits on the eastern coast of Great Nicobar Island, looking out over the Andaman Sea, with the open Indian Ocean to the south. * **Galathea River:** The most prominent river on the island, flowing southward and emptying into the sea near Galathea Bay. * **Alexandria River:** Another significant freshwater river system supporting the island's dense forest ecosystems.
