An adjustable weight kettlebell includes a body defining an internal cavity configured to receive one or more of a plurality of weights, and a weight selector assembly configured to selectively couple one or more of the plurality of weights to the body. The weight selector assembly may include an actuator to enable a user to select one of a plurality of available weight settings. The weight selector assembly may be locked for adjustment when the kettlebell is removed from a support surface such as a base, thereby inhibiting inadvertent detachment of the weights from the kettlebell during exercise. The weight selector assembly may automatically shift to the closest weight settings upon release of the actuator and may automatically unlock upon placement of the kettlebell on the support surface such as the base, the bottom weight if not coupled to the kettlebell, or any other suitable support surface.