The Cuvelai-Etosha basin (CEB) is an ephemeral river system, a system of shallow pans, locally known as 'Iishana' situated in northern central Namibia. Research on climate change theory, the use of General Circulation Model's (GCM's) and historical precipitation observations were the basic inputs for the study. Using R, annual and seasonal precipitation from observations and simulated data were plotted to represent the trends. The data used for the analysis included precipitation records from Okaukuejo (1934-2007), Oshikuku (1931-1997) and Ombalantu (1930-1996).