Due to the widespread use of smart metering infrastructure, multidimensional data on home electric consumption is easily available for studying its dynamics at finely resolved geographical and temporal scales. Effective forecasting and analysis of electric consumption are crucial for customer participation in time-of-use tariffs, critical peak pricing, and userspecific demand response programs derived from multidimensional data streams. Along with the enormous economic and sustainability ramifications, such as energy waste and the decarbonisation of the energy industry, precise consumption forecasts enable power system planning and reliable grid operations. Energy consumption forecasting is a hot field of research; despite the number of developed models, projecting electric consumption in residential buildings remains problematic owing to the significant unpredictability of occupant energy use behaviour. Discovering the electricity consumption knowledge from the Multi-Dimensional Data Streams (MDDS) of electricity logs is a challenging research problem. To end this, a novel electricity knowledge discovery model proposed from the MDDS using clustering and machine learning. Context-Aware Clustering with Whale Optimization Algorithm (CAC-WOA) is designed and explained in this research article. The CAC-WOA consists of two phases context-aware groups formation and WOA-based machine learning predictive model. In the CAC algorithm, group's formation using electricity contextual information to estimate the robust predictive features are proposed. Using such predictive features, the predictive model using the WOA-based Artificial Neural Network (ANN) is built. The modified ANN technique using the WOA algorithm is used to reduce the error rates and improve the prediction accuracy. The experimental outcomes using publically available electricity consumption datasets prove the efficiency of the CAC-WOA model.