The invention provides a hinged raft wave energy conversion device (WEC) comprising: a first fore floating body; and a second aft floating body; wherein the first and second floating bodies are connected by a hinge joint for rotation of the bodies relative to each other, in use, about an axis parallel to the still water surface and transverse to the direction of wave propagation; wherein the first and second bodies extend away from the hinge joint in opposite directions; and wherein at least one of the first and second bodies has a sloped surface extending in the direction away from the hinge joint, at least a portion of the sloped surface being under the waterline at least when the device is in the still water rest position.