Abstract: A boat propeller safety cover includes a soft, flexible, somewhat pouch-shaped body having a stretchable opening sized and structured to receive a propeller unit while the propeller unit is mounted to a recreational water craft. The body may be formed of multiple layers of material, for example, a substantially puncture resistant, or cut resistant material which forms an inner surface of the body and a soft, foam-like material which forms an outer surface of the body. The safety cover provides an effective barrier or buffer between the sharp blades of a propeller unit and a human being, for example, a swimmer, while the boat is docked on the beach, or anchored in open water, for example.