A non-penetrating antenna mounting system is provided. The system includes a frame, an antenna, and an airfoil. The frame is configured to retain ballast to secure the frame to a surface of a structure without penetrating the surface of the structure. The antenna is mounted on the frame. The airfoil is mounted on the frame and is oriented relative to the frame to impart a downforce on the frame when exposed to wind. The airfoil can be rotatably mounted on the frame. The system can also include a wind vane mounted to the airfoil, with the wind vane and the airfoil being configured to turn into the wind.