Closest beach to Downtown San DIego. There are two hostels in the area. OBI hostel is located on newport Ave. - main St. of OB, just a block away from the ocean, and is convenient in every way.
Live music, farmers market(Wednesdays), endless sunshine, surfing, Irish pubs and happy hippies will make you want to stay in this place.
Longest pier on the west coast is the nicest place to take a walk as the sun goes down.