Abstract: Using mooring and sectional observations in spring of 2023, this study investigates the tidal current characteristics and water volume transport in the Qiongzhou Strait. Results show that there are three dominant tides in the strait, i.e., diurnal (O₁), semi-diurnal (M₂), and third-diurnal (M₃) tides, of which the diurnal tide is strongest, and their amplitude ratios is 1.0 : 0.40 : 0.19. The major axes of tidal current ellipses generally aligns with coastline, with maximum amplitudes occurring at sea surface. The ellipses rotate clockwise (counterclockwise) in upper (lower) layer for O₁, but clockwise for M₂ and counterclockwise for M3 in entire water volume. The water volume transport associated with residual current across the strait is primarily westward, varying between −0.10 Sv and 0.05 Sv, with an average of (−0.04±0.04) Sv. With variation of sea surface height difference and background currents at the two ends of the strait, eastward residual flow was observed during late period of the observation. Our results will be helpful to understand the seasonal variability of water exchange between the Beibu Gulf and the South China Sea.