The north west Kimberley coast of Western Australia supports six of the world’s seven marine turtle species, including green turtles (Chelonia mydas) and flatback turtles (Natator depressus), both listed as Vulnerable under the EPBC Act. Flatback turtles, known locally as Mardumal, are endemic to northern Australia and remain data deficient under the IUCN Red List. Green turtles, known as Juluwarru, also hold deep cultural significance for Wunambal Gaambera Traditional Owners, whose knowledge of Sea Country is essential for understanding and protecting these species. Despite their ecological and cultural importance, major gaps remain in identifying priority nesting sites, seasonal patterns, habitat use and emerging threats such as climate change. This study was led by the Wunambal Gaambera Aboriginal Corporation and combined Traditional Owner (TO) knowledge with modern spatial science to map turtle nesting activity across the Uunguu Indigenous Protected Area (IPA) in the north west Kimberley. Outcomes from TO-led community workshops, including the identification of culturally important nesting beaches, threats to sea turtles and their nests and the areas of the IPA that require more focused management. These insights guide the interpretation of spatial data and ensure that conservation priorities reflected Traditional Owner perspectives and priorities. High‑resolution georeferenced imagery from aerial surveys was analysed in QGIS to identify turtle species tracks, estimate nesting success, assess track age, quantify body pits, and record predator presence. These identified sea turtle tracks were then digitized to estimate abundance and distribution across the region during the wet (December 2023) and dry season (August 2024). Wet season surveys across 217 km of coastline revealed strong green turtle dominance (90% of tracks), with high nesting activity documented at North and South Maret, Lamarck, Cassini, and Berthier Islands. Dry season surveys covering 280 km showed a shift toward flatback dominance (~90%), with South Maret Island again emerging as a key nesting site for this species. By integrating cultural knowledge with contemporary geospatial methods, this study strengthens community led conservation planning for culturally significant marine turtles on Sea Country.