A shocked homeowner woke up to find a seal lounging on her patio.
The woman spotted the adventurous female – named Dandy by locals – sprawled out on her lawn in Billinghay, Lincolnshire.
RSPCA rescuers were called out and, after making sure the amphibious mammal was in good health, returned her to the water.
Dandy previously made a splash when she clambered onto another woman’s paddleboard during a lesson in Boston.
PC Martin Green, from the local force’s wildlife team, said he had received a call from a friend saying ‘his mum had woken up and found the seal on the patio’.
Dandy appears to have scrambled up a riverbank before slipping into the garden.
The RSPCA said they were alerted by the police and, after checking Dandy over, released her back into the water where she ‘happily swam off’.
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