A "wave mill" that is adapted from modern windmill designs. The wave mill has a long vertical shaft, positioned in the sea and secured to the seabed. The mill has a number of long blades (arms) that have hinged fins attached. The number of these fins depends upon the change in tides. Adding more fins ensures that the mill will operate at all tidal levels in a given area. The wave mill does operate with the wind. Therefore, it does not rotate to follow changing wind conditions. Several arms are needed for maximum generation efficiency. To provide stability for the structure, supports are placed on the sides of the structure. The structures use large rings to brace the arms against strong crosswinds. The arms are connected at a central hub, which has shafts extending from both sides. The shafts connect to bearings and to a generator.