How often do tides occur?
There are basically three types of tidal regime. Diurnal tides are those where one High and one Low Water occur during a period of 24 hours mainly experienced in the Pacific Ocean. Semi-Diurnal tides are characterised by having two High and Low Waters in a 24 hour period mainly experienced in the Atlantic Ocean. The third type is Mixed, where the tidal regime exhibits characteristics of both Diurnal and Semi Diurnal tides experienced in areas such as the Indian Ocean, Gulf of Mexico, and Australia.
