Tides along estuaries are modified by geometric convergence, frictional dissipation, and freshwater inflow, producing tidal amplification, attenuation, and current asymmetry. Although substantial research has examined hydrodynamics in the Ganges-Brahmaputra-Meghna (GBM) delta, tidal propagation and current asymmetry across the estuarine network remain poorly resolved. This study explores tidal evolution and current asymmetry across six principal estuarine channels of the GBM delta. A high-resolution depth-averaged hydrodynamic model was configured using Delft3D Flexible Mesh (FM) and validated for an average hydrological year (June 2020 to May 2021). Spatiotemporal variations in tidal range were quantified from model outputs. Time-varying diurnal (D1), semidiurnal (D2), and quarter-diurnal (D4) bands were extracted through the complex demodulation approach. Tidal current asymmetries, including Peak Current Asymmetry (PCA) and Slack Water Asymmetry (SWA), were derived from a skewness-based method. Results revealed pronounced spatial heterogeneity in tidal propagation and current asymmetry. The western estuaries exhibited strong landward amplification, with mean tidal range increasing up to 68% over ~100 km from the estuarine mouth, whereas the central and eastern estuaries showed progressive inland attenuation of about 38–65%. Semidiurnal tide dominated propagation, while nonlinear overtide (D4) growth peaked in mid-estuarine reaches and intensified where amplification occurs. SWA was mainly flood-dominant across the channels, while PCA remained ebb-dominant in the central and eastern estuaries but exhibited both flood and ebb dominance in the western system. These results show how offshore tidal forcing at the Bay of Bengal boundary is transformed across a deltaic estuarine network, with implications for land-ocean exchange and delta management.