A review is carried out from ancient word of mouth to the present day scientific studies of the hydrodynamics of the Singapore Strait. Various beliefs about whirlpools in and around Singapore Strait are correlated with the present day eddies or vortices observed through hydrodynamic modelling. A semi-implicit Eulerian-Lagrangian finite element (SELFE) model was used for numerical modelling of the hydrodynamics in the Singapore Strait. The vortices and high current streams observed in Singapore Strait are analysed for possible source of clean renewable energy. The vortex-induced vibration (VIV) of eddies or vortices can be converted to renewable energy through available modern technologies. The tidal energy can also be extracted from flood and ebb current of the tidal streams at suitable locations. A review of technologies available for extraction of renewable energy from tidal steam current and VIV was carried out.