The study focuses on the development of analytical methods to compensate for the temperature effects on guided wave propagation. The physical effects of temperature upon the registered signals using piezoelectric sensors mounted in pitch-catch configuration are explored experimentally over considerably large temperature range and frequency bandwidths. The observations made are mathematically interpreted and a mathematical framework which enables a new strategy for compensation of the temperature effects on Lamb waves is formulated. The strategy is validated in an experimental campaign where the plate with the installed SMART Layer is monitored for low temperature differences, at room conditions, over longer periods of time. Damage scenarios under the form of added mass were considered and the influence of temperature on the damage detection and the efficiency of the proposed strategy are investigated. KEYWORDS : Structural Health Monitoring (SHM), Guided Waves, Piezoelectric Sensors, Temperature Effects, Signal Processing.