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Tidal power or tidal energy is a renewable energy source and a form of hydropower that converts the energy obtained from tides into useful forms of power, mainly electricity.

Tidal power is a form of renewable energy source generated by the rise and fall of ocean tides. This natural energy can be captured using a barrage, or dam, that is built across an estuary. The energy is stored when the tide rises up the barrage, and can then be released as the tide falls to turn turbines and generate electricity. Because tides are predictable and renewable, tidal power is a reliable source of electricity generation and does not rely on any fossil fuels. The technology is also environment friendly, as it does not generate any pollutants and requires no additional land. Additionally, the tides provide a steady source of energy and help manage peak electricity demand by ensuring availability of power on days when other sources of energy may be unreliable.