Long term apartment let sought in San Sebastián region

Hello,

I am looking at moving to the region for several months and it would be great to get any advice you may have about good websites or places to search. Also any advice about areas would be appreciated. I would like to be able to access the beach relatively easily but don't expect I can afford to pay for sea views! It's just for me and am looking for a whole apartment not just a room.

Many thanks!