Hi. Im looking to rent an apartment in valencia city for a couple of months over the summer. Does anyone have any advice about how I would go about finding somewhere? Any advice appriciated

Well that's an easy thing in Barcelona but Valencia is still very spanish so you might have problem finding apartments. If you are ok with a share apartment with students, then go to the university, you will find plenty of advertisement everywhere.
If not, just check website like http://www.accommodation-valencia.com but it is usually for shorter stay.
good luck