This paper addresses the impact of effective forecasting in relation to business growth in South Sudan. The main aim of this study is to examine the scientific application of forecasting techniques in modern business and to prove its effectiveness on business growth. Different forecasting techniques are applied in this study to determine the correlation in this respect. The multiple methodologies (combination of face to face interviews and structured questionnaires) to collect relevant data are used and Statistical Package for Social Sciences (SSPS) for data analysis is applied. A sample size of 61 sixty one business were taken to measure the impact of forecasting on them in relation to business growth. The cross data statistics suggest that there is strong correlation between forecasting and business growth in a given market and most business forecasting are based on the length of experience and subjective manager's judgments.