In order to be able to determine with precision the location of the stagnation point at different zones along the leading edge of an aerodynamic profile, a system comprises rows of pressure sensors distributed on either side of the leading edge and forming, virtually, patterns that are spaced apart from one another in the form of simple polygonal lines, and a computer connected to the pressure sensors. The computer determines, along each of the patterns, a respective stagnation point position that is defined by a curved abscissa for which a pressure interpolated on the basis of pressure measurements provided by the pressure sensors of the corresponding row is at a maximum, and by an altitude evaluated on the basis of respective altitude data from the pressure sensors of the corresponding row.