A floating, semi-submersible wind turbine platform comprising: at least three elongate stabilizing columns, each of the stabilizing columns having a top end, a keel end, and an outer shell containing an inner shaft, each of the stabilizing columns having a water entrapment plate at its keel end, each water entrapment plate being cantilevered in a plane perpendicular to a longitudinal axis of the stabilizing column; at least three truss members, each truss member including two lateral main tubular members and two diagonal tubular members, each of the lateral main tubular members having a first end connected perpendicularly to the inner shaft of one of the stabilizing columns and a second end connected perpendicularly to the inner shaft of a different one of the stabilizing columns such that the interconnected stabilizing columns and truss members form a convex polygonal cross-section in a plane perpendicular to the longitudinal axes of the stabilizing columns, where the sides of the convex polygonal cross-section are the truss members and the vertices of the convex polygonal cross-section are the stabilizing columns, and for each truss member, the two diagonal tubular members each having a first end and a second end where the first end of each diagonal tubular member is connected to the inner shaft of one stabilizing column and the second end of each diagonal tubular member is connected to one of the lateral main tubular members in the same truss member; and an elongate wind turbine tower disposed over the top end of one of the stabilizing columns such that the longitudinal axis of the tower is substantially parallel to the longitudinal axis of the stabilizing column. at least three elongate stabilizing columns, each of the stabilizing columns having a top end, a keel end, and an outer shell containing an inner shaft, each of the stabilizing columns having a water entrapment plate at its keel end, each water entrapment plate being cantilevered in a plane perpendicular to a longitudinal axis of the stabilizing column; at least three truss members, each truss member including two lateral main tubular members and two diagonal tubular members, each of the lateral main tubular members having a first end connected perpendicularly to the inner shaft of one of the stabilizing columns and a second end connected perpendicularly to the inner shaft of a different one of the stabilizing columns such that the interconnected stabilizing columns and truss members form a convex polygonal cross-section in a plane perpendicular to the longitudinal axes of the stabilizing columns, where the sides of the convex polygonal cross-section are the truss members and the vertices of the convex polygonal cross-section are the stabilizing columns, and for each truss member, the two diagonal tubular members each having a first end and a second end where the first end of each diagonal tubular member is connected to the inner shaft of one stabilizing column and the second end of each diagonal tubular member is connected to one of the lateral main tubular members in the same truss member; and an elongate wind turbine tower disposed over the top end of one of the stabilizing columns such that the longitudinal axis of the tower is substantially parallel to the longitudinal axis of the stabilizing column.