Abstract <p>Sustainable production of distilled water using solar desalination systems is becoming more attractive in recent years. Many researchers are trying to enhance the efficiency of such systems. In this study, an improved Parabolic Dish Solar Water Desalination System (PDSWDS) is developed utilizing solar tracking system and finned tube to produce distilled water. The improved solar system consists of solar collector dish to collect solar energy and reflect it to a still tank (receiver) that has the sea water and the system tested in the hot environmental conditions of Iraq. Due to the increased concentration of solar radiation, the temperature is increased inside the still tank causing the water to evaporate. To increase the condensation rate of water vapors, fines are provided over the surface along the length of the main receiver. Sun tracking system is equipped with the dish collector to enhance the efficiency of the solar desalination system. The system used to provide 40 to 50 L of pure water per day, assuming that the structure works about 8 h per day. Results showed increase in temperature of the still tank by 120°C when sun tracking system was employed compared with the system without it in which temperature reached to 71°C. The overall findings of this study show that the thermal efficiency increased by 30% than the manual tracking system and using fins in the solar desalination system was expanding the condensation of the desalination water even in the high ambient temperature in summer.</p>