The border was originally due to reopen on 1 July, but the Telegraph reports Spanish prime minister Pedro Sanchez announced the revised timeline yesterday (14 June), as reported by Spanish newspaper El Pais.
Travellers from other, non-Schengen countries will be allowed into the country without the need to self-quarantine from July 1 onwards, if there is a reciprocal agreement, the Telegraph reports.
TTG has approached the Spanish government for more information.