Portugal surfing trip advice needed!

Hello everyone!
Im planing a surfing trip beginning of September, i have only one week and ill land in Porto, im looking for a cheap accommodation (10 eu a night hostel will be great) in a surfing town nearby.
i know that the surfing tourism is not well developed yet over there and i dont have the budget to rent a caravan.
if someone knows a surfing town or a surf spot near Porto with cheap hostel walking distance to the beach ill be grateful.
i already searched all over the web and couldn't find anything helpful.
thanks
Im planing a surfing trip beginning of September, i have only one week and ill land in Porto, im looking for a cheap accommodation (10 eu a night hostel will be great) in a surfing town nearby.
i know that the surfing tourism is not well developed yet over there and i dont have the budget to rent a caravan.
if someone knows a surfing town or a surf spot near Porto with cheap hostel walking distance to the beach ill be grateful.
i already searched all over the web and couldn't find anything helpful.
thanks