A steering apparatus for a steerable vehicle includes a steering actuator, a steering input unit, a disturbance determination section, and a steering controller. The steering actuator is configured to generate a steering effort to regulate a steering output of the vehicle, in accordance with a steering effort command. The steering input unit is configured to set a steering input. The disturbance determination section is configured to determine a disturbance indicator indicative of a disturbance input to the vehicle. The steering controller is configured to perform the following: setting a desired steering output in accordance with the steering input; setting the steering effort command in accordance with the desired steering output; adjusting the steering effort command in accordance with the disturbance indicator; and outputting the adjusted steering effort command to the steering actuator.