Travel in Europe is subject to restrictions due to the COVID pandemic. The omicron variant has led to higher numbers of infections, but which are often less severe. These are the current rules in Spain.
Those traveling to Spainfrom the EU or Schengen zone no longer need to show proof of vaccination, recovery, or a negative test result
Main article: What are the COVID entry rules for travelers to European countries?
Spain still requires mask to be worn on public transport and in healthcare facilities.
Regions can institute individual coronavirus safety rules, such as a maximum capacity for certain venues and establishments and limits on social gatherings.
More information here