Wildfires in the Mediterranean region is a serious problem and monitoring their effects is of highest importance. Greece, as part of the Mediterranean region, is a highly prone area, suffering from many wildfires each year, especially during summer. Thasos Island, located in northern Greece, is a representative natural “laboratory” because of the landscape and the vegetative diversity in a relatively small area but also because it has experienced many wildfires from 1984 until now. The study focused around Kallirachi-Maries area in the western part of Thasos due to the wildfire of 2013. Two high resolution satellite images before and after the wildfire of 2013 were used in order to obtain the NDVI vegetation index and study the post-fire vegetation regrowth and soil erosion potential. The image analysis captured a burnt area of 4 km2 but the overall affected area was even greater. The specific methodology, presented in this study, is very helpful in order to monitor wildfire impacts and would be beneficial if adopted by the responsible authorities.