Wave absorber unit comprising an absorber element of the front pivot type for the absorption of wave energy from a body of water, the absorber element having - a front end comprising a front pivot axis around which the absorber element swings under operation, and - an absorber element body being substantially defined by a front side extending from the front end to a lower rear edge, a rear side extending from an upper rear edge to the lower rear edge, a top side extending from the front end to the upper rear edge, and lateral sidewalls (7, 8) defining the width Fw of the absorber body in an axial direction parallel to the front pivot axis, wherein the lower rear edge is located in a first radial direction at a first distance from the pivot axis, and the upper rear edge is located in a second radial direction at a second distance from the pivot axis, wherein the first and second radial directions (11, 12) define an acute tip angle (alpha) of the absorber element, wherein the first distance defines the absorber element length FI, and the distance of the upper rear edge from the first radial direction defines the absorber element height Fh, the absorber element having a cross-sectional profile as seen in a cut-plane perpendicular to the front pivot axis, wherein said absorber element profile encloses a profile of the absorber element body and the front pivot axis, characterised in that the absorber unit is rotatable about a vertical axis and in that the absorber unit further comprises - a frame pivotally supporting the absorber element from the front pivot axis, wherein in an idle position the front pivot axis is located at a predetermined front pivot axis height Fa above still water, and the absorber element is partially submerged with an idle draught Fd, whereby the absorber element profile includes a concave portion at the front side as seen in a direction from the front end to the rear end, which bulges inwardly and away from the first direction to form a generally concave pressure surface for capturing the incoming waves. - a front end comprising a front pivot axis around which the absorber element swings under operation, and - an absorber element body being substantially defined by a front side extending from the front end to a lower rear edge, a rear side extending from an upper rear edge to the lower rear edge, a top side extending from the front end to the upper rear edge, and lateral sidewalls (7, 8) defining the width Fw of the absorber body in an axial direction parallel to the front pivot axis, wherein the lower rear edge is located in a first radial direction at a first distance from the pivot axis, and the upper rear edge is located in a second radial direction at a second distance from the pivot axis, wherein the first and second radial directions (11, 12) define an acute tip angle (alpha) of the absorber element, wherein the first distance defines the absorber element length FI, and the distance of the upper rear edge from the first radial direction defines the absorber element height Fh, the absorber element having a cross-sectional profile as seen in a cut-plane perpendicular to the front pivot axis, wherein said absorber element profile encloses a profile of the absorber element body and the front pivot axis, - a frame pivotally supporting the absorber element from the front pivot axis, wherein in an idle position the front pivot axis is located at a predetermined front pivot axis height Fa above still water, and the absorber element is partially submerged with an idle draught Fd,