In the present study, a Single sloped cascade solar distillation unit with total evaporation area of 0.996 sqm was fabricated and the performance analysis has been carried out during the months of April, May, June and July in the year 2006 at solar energy laboratory of Physics Department, Avinashilingam University, Coimbatore. Temperatures of water, glass cover and step temperature were recorded at regular intervals using thermocouples. Insolation, ambient temperature, and wind velocity were also recorded on sunny as well as cloudy days The daily distillate output varies between 2000-2500ml on sunny days from 9.00AM to 4.00PM., while the solar insolation varies between 700-870 w/m2. The daily distillate output varies between 880-1900ml on cloudy days between 9.00AM to 4.00PM., while the solar insolation varies between 330-700 w/m2. The nocturnal distillate output varies between 200-500ml. The efficiency of this solar still was found to be in the range of 20-30%.