Convergence front in estuaries is of paramount interest, as it is influenced by multiple mixing processes which vary from one tidal cycle to another. Density gradients exert a significant influence on circulation patterns occurring within the convergence front of estuaries. Particularly, in salt wedge estuaries, where the influence of discharge is proportionally higher than that of tides. There is a limited amount of research based on high-resolution in-situ data to analyze circulation and mixing processes affected by density gradients in the converge front of a salt wedge estuary. This study emphasizes the investigation of circulation and mixing patterns along the water column and at the mixing layer, where significant processes arise at the fresh-saline water interface. Continuous measurements of current velocities in the convergence front, along with CTD profiles, were conducted over three tidal cycles to analyze the intratidal variability of circulation patterns (u, v, w) and mixing parameters. The stratification parameter ([[EQUATION]]) and Richardson numbers ([[EQUATION]] and [[EQUATION]]) were calculated to analyze the mixing/stratification variability within a tidal cycle. A persistent Subsurface Velocity Maximum (SVM) was observed in the longitudinal component, which coincided with increases in density gradient along the water column. Similarly, lateral circulation patterns were influenced by those increases in density gradient, resulting in eastward-directed currents and the formation of two circulations cells. As expected in a salt wedge estuary, stratification occurs during flood and High Water (HW) when the density gradient increases due to intrusion of the salt wedge. However, in the Magdalena River estuary, when the discharge is below 3800 m3 s-1, the salt wedge remains consistently present irrespective of the tidal phase, resulting in a permanently stratified water column. It is expected that the steady presence of stratified conditions during periods of low discharge leads to an increased accumulation of sediments.