Kambunong Island waters are an area located in Central Mamuju Regency, West Sulawesi Province, based on the geographical location of Kambunong Island waters in the Makassar Strait which has unique bottom characteristics, to obtain more specific information about the topography of the water bottom, further research is carried out. This study aims to determine the value of water level elevation, water depth and bottom topography of Kambunong Island waters. This research was conducted from December to January 2023. Data processing was carried out using the Admiralty method and map interpolation using Arcmap software. Based on the results of the research conducted, it can be concluded that the water level elevation of Kambunong Island waters is the highest astronomical tide HAT = 2,52 m, mean higher high wate springs MHHWS = 2,17 m, mean higher high water neaps MHHWN = 1,34 m, mean sea level MSL = 1,26 m, mean lower low water neaps MLLWN = 1,18 m, mean lower low water springs MLLWS = 0,35 m, lighest astronomical tide LAT = 0 m. And the water depth of Kambunong Island at The research area has a depth of -28.5 m at the lowest tide, and can reach a depth of -31.5 m at the highest tide with an average tide height of 2.5 m to 3 m. In the research area with an area of 295 m2, the bottom topography of Kambunong Island waters has 4 gusung areas with heights of 23 m, 18 m, 6.5 m and 10 m and from the bottom of the waters. It is hoped that the data from the research conducted can be utilized by the local community as a reference in the construction of beach facilities.