A method for determining the temperature of an away-facing surface of an object, wherein at least one ultrasonic pulse is transmitted through a surface of the object facing a transmitter/receiver unit into said object; the at least one ultrasonic pulse is reflected at least partially in the direction of the transmitter/receiver unit on the surface of the object facing away from the transmitter/receiver unit; and the reflected part of the at least one transmitted ultrasonic pulse is received by the transmitter/receiver unit. At least one temperature value for the object surface facing the transmitter/receiver unit is also determined; at least one value is determined for the propagation time of the at least one ultrasonic pulse through the object, and at least one temperature value for the object surface facing away from the transmitter/receiver unit is determined by the at least one temperature value for the object surface facing the transmitter/receiver unit and the at least one propagation time value.