This book chapter explores the pivotal role of precision agriculture in addressing the challenges of water scarcity in modern agricultural practices. The chapter will describe the significance of precision agriculture in the context of contemporary farming and its vital role in managing water resources efficiently in water-scarce environments. The objectives of the chapter are outlined to guide the readers through the key topics covered. The fundamentals of precision agriculture are discussed, encompassing its definition, evolution, and integration of precision irrigation into farming systems. Various irrigation techniques, from traditional methods to modern technologies like drip irrigation and sprinkler systems, are examined, highlighting their advantages in enhancing water distribution efficiency. The chapter will cover precision agriculture technologies for water management, including soil moisture monitoring through sensor technologies, weather-based irrigation scheduling systems, remote sensing, and Geographic Information Systems (GIS) applications. Further, the implementation of the Internet of Things (IoT) in water management for precision irrigation will be discussed. Data analytics and big data play a crucial role in precision irrigation, hence the chapter focuses on harnessing big data for water use efficiency, decision support systems, and the application of machine learning algorithms for predictive irrigation management. The chapter further explores precision irrigation’s impact on crop water requirements, emphasizing tailoring irrigation practices to crop growth stages and managing water stress through precision irrigation. Challenges and barriers in adopting precision irrigation are addressed, such as initial investment, technology acquisition, farmer training, capacity building, and infrastructural limitations. Case studies and success stories of precision irrigation implementations in different crops are presented, highlighting real-world impacts on water conservation and crop yields. The chapter will be concluded by outlining future prospects and opportunities in precision agriculture and irrigation and exploring the policy implications and government support required to promote sustainable agricultural water management.