This paper presents the evaluation of the energy efficient localisation method for a mobile WSN. The proposed method utilises a distance-based location estimation method together with a digital compass and a speed sensor attached to the mobile nodes. Trilateration was used to estimate the very first location of the nodes by deploying three beacon nodes. The beacon nodes sent broadcast signals to the nodes and the receiver was able to estimate its distance by the RSSI levels. Each sensor node was equipped with a digital compass which gave the angle of the movement and a speedometer was used to retrieve the speed of the node. By using the first location obtained through trilateration, the angle and speed of the movement, the next location of the node in question was then estimated. To evaluate the location estimation method, a simulation of the evaluated methods using the Network Simulator 2 (NS2). The second experiment included prototype hardware of a mobile node and implementation in an area.