How are you defining premodern? 1890? 1500? Medieval, etc?
Hey there, take a look at these past answers:
When did "going to the beach" become a popular, recreational activity? by u/thesoulphysician
When did "going to the beach" become a popular way to spend time? by u/MarcEcko
Did ancient peoples "go to the beach" as we do today? - multiple authors
Did ancient people go to the beach? by u/DarthPositus