This book on Ocean Dynamics is a comprehensive collection of materials utilized in my personal teaching at Berhampur University, University of Hyderabad, and Arbaminch University. It is primarily intended for graduate and postgraduate students studying Oceanography, physical oceanography, meteorology, atmospheric sciences, Aeronautical, Agricultural, and space meteorology, as well as various related fields in civil and ocean engineering.A distinct characteristic of this book is the inclusion of numerous exercises and their solutions under each chapter to enhance comprehension and practical application. The content of the book encompasses virtually all significant topics in physical oceanography, such as currents with and without friction, upwelling and downwelling, water masses and TS-analysis, waves and tides, Estuaries, internal waves, seiches and storm surges, and Rossby and Kelvin waves, among others. Particular emphasis is placed on recent advancements in North Indian Ocean circulation.