UK tides information for all standard and secondary ports is provided to the BBC Weather Centre by the UK Hydrographic Office (UKHO). This allows us to provide an on-line six day tidal prediction service aimed at leisure mariners, holidaymakers and enthusiasts of coastal pursuits. Find out more about tides in our features section (see right). The locations are loosely divided up into 'regional' sections around the coastline, but these may not correspond exactly with geographic, political or BBC TV regional boundaries.