Hydrofoil with variable lift and drag for a watercraft

A hydrofoil intended for a watercraft, said hydrofoil comprising a fuselage and two wings arranged on either side of the fuselage and designed to provide hydrodynamic lift to the hydrofoil when it is moving through the water, wherein the two wings are rotatable relative to the fuselage between a deployed position when the hydrofoil is stationary and a retracted position towards a rear part of the fuselage by the water pressure exerted on the wings as the hydrofoil moves through the water, in the deployed position, the two wings are substantially perpendicular to a longitudinal axis (L) of the fuselage, in the retracted position, each of the two wings forms an angle with the longitudinal axis (L) when the speed of the hydrofoil is greater than a minimum speed, the angle being less than 90° and decreasing progressively as the speed of the hydrofoil increases, the hydrofoil comprising a mobile assembly translating inside the fuselage along the longitudinal axis (L) and relative to the fuselage, the wings being mechanically connected to said mobile assembly, the retraction of the two wings towards the fuselage causing translation of the mobile assembly towards a front part of the fuselage, and deployment of the two wings causing translation of the mobile assembly towards the rear part of the fuselage.