Exemplary embodiments of mountable and adjustable antenna apparatuses and methods are disclosed. In one exemplary embodiment, a mountable and adjustable antenna apparatus includes a top housing member, a bottom housing member, and an antenna assembly being disposed within the top housing member. The top housing member is in rotatable relation to the bottom housing member. The antenna assembly is in fixed relation to the top housing member. The top housing member has an aerodynamic configuration for reducing drag on, and for eliminating fatigue as well as flutter of, the antenna assembly.