An actuating system for a wing arrangement for an aircraft, which wing arrangement includes a wing comprising a base section having a first end portion adapted to be secured to the fuselage of an aircraft and an opposite second end portion, and a tip section having a third end portion and an opposite fourth end portion, wherein the third end portion is pivotably connected to the second end portion such that the tip section is pivotable about a pivot axis between a deployed position and a stowed position in which the spanwise length of the wing is smaller than in the deployed position, wherein the actuating system comprises: an actuating arrangement which comprises an actuator, a first coupling part and a second coupling part, wherein the first coupling part is adapted to be coupled to the base section, the second coupling part is adapted to be coupled to the tip section and the actuator is operable to move the second coupling part with respect to the first coupling part between a first position and a second position, such that when the first coupling part is coupled to the base section and the second coupling part is coupled to the tip section the actuating arrangement is operable to selectively move, by operating the actuator, the tip section between the deployed position and the stowed position, wherein in the first position of the second coupling part the tip section is in the deployed position and in the second position of the second coupling part the tip section is in the stowed position, characterised in that the actuating system further comprises a heating arrangement which is positioned and adapted to be operable to heat at least one portion of the actuating arrangement such that at least for ambient temperatures below a predetermined temperature the required work to be effected by the actuator when moving the second coupling part between the first position and the second position is lower than without heating the at least one portion. an actuating arrangement which comprises an actuator, a first coupling part and a second coupling part, wherein the first coupling part is adapted to be coupled to the base section, the second coupling part is adapted to be coupled to the tip section and the actuator is operable to move the second coupling part with respect to the first coupling part between a first position and a second position, such that when the first coupling part is coupled to the base section and the second coupling part is coupled to the tip section the actuating arrangement is operable to selectively move, by operating the actuator, the tip section between the deployed position and the stowed position, wherein in the first position of the second coupling part the tip section is in the deployed position and in the second position of the second coupling part the tip section is in the stowed position, characterised in that the actuating system further comprises a heating arrangement which is positioned and adapted to be operable to heat at least one portion of the actuating arrangement such that at least for ambient temperatures below a predetermined temperature the required work to be effected by the actuator when moving the second coupling part between the first position and the second position is lower than without heating the at least one portion.