This study is motivated by the need for an efficient tool to accurately analyse an impact event on composite structures, localize the impact position and estimate its severity. The behavior of a carbon fibre reinforced polymer (CFRP) composite during low velocity impacts is analyzed and impact damage mechanisms are evaluated using both numerical prediction tools and experimental measurements. Numerical predictions are carried out using finite element models supported by progressive failure analysis tools. To perform the numerical tasks, the explicit finite element code LS-Dyna is used. Impact tests are carried out with a modified Charpy pendulum. Two experimental techniques are used to monitor the impact event: infrared thermography and bonded piezo patches. A good agreement between numerical predictions and experimental measurements, regarding the onset and the extension of the damage with increasing impact energy, is found.