Temporal Lobe Epilepsy (TLE) is the most common form of epilepsy in adults, with a considerable proportion of patients who do not respond to different therapeutic approaches and have to resort to surgical intervention. TLE is linked to cognitive deficits, but few studies have investigated metacognitive abilities in this group. Two studies were conducted to assess metacognition and metamemory on adult patients with right or left temporal lesions associated with refractory TLE after neurosurgery. In Study 1, computerized experimental Success-Failure Manipulation tasks exploring memory and reaction time were used, with participants doing easy (success) and hard (failure) tasks for each task type and metacognition being measured by discrepancy between post-test estimations and actual performance. Study 2 explored metamemory for verbal and visual episodic memory tests with global estimations of performance before and after trials. Results of Study 1 indicate that patients can discriminate the success and failure conditions, particularly for reaction time tasks. Study 2 indicated that left hemisphere patients show a pattern of overestimation, both for visual and verbal memory, in relation to right hemisphere patients. These results are discussed in relation to the potential aid of metacognition in therapeutic interventions, especially in the creation of compensatory strategies that can help improving quality of life in TLE.