Studies show that the southern regions of Turkey, within whichalso Mersin is located, would be greatly affected by possible climatechange. According to a report published by NASA, the most severedroughts of the last 900 years are being witnessed in the EasternMediterranean Basin. In this context, the study of the drought of Mersinin the Eastern Mediterranean Basin is of great importance.In this study, the drought analysis on, and the Thornthwaiteclimate classification for Mersin and the surrounding area was carriedout (1965-2014). The Standardized Rainfall Index (SPI), NormalPercentage Index (PNI) and Erinç Drought Index were used in our study.Drought analyses on monthly, annual and seasonal scales were carriedout. According to the Erinç drought index, extreme climatic conditionshave been experienced frequently over the past 15 years. For example,the results of the SPI analysis show that there was a lack of precipitationin Mersin across all months of the year 2008. Again, 2009 became thedriest year of the last 55 years. After 1968, the years 2001 and 2012represent the most humid climatic conditions in Mersin. However thereis a significant negative trend, especially throughout the winter months.2001 and 2012 have been the most humid periods in recent years. If themonthly SPI values of these periods have been examined, it can be seenthat the humidity of 2001 originated from heavy rainfalls which hadoccurred in December. The precipitation which fell in December 2001was the highest rainfalls the last 55 years. Another drought index usedin our study is PNI. The PNI was calculated using monthly rainfall dataof 1965-2014 belonging to the Mersin station. It is seen that PNI resultswere consistent with those obtained from Erinç and SPI models. The year2008 is recorded as being arid according to the PNI analysis. Accordingto the PNI analysis, the year 2008 was observably arid while moistconditions for the year 2012 are worthy of note.