San Sebastian is a great place to go to relax on the beach, eat amazing food, and perhaps see a few sights, but no major museums or whatnot here. It does get extremely crowded in the summer, but if you like to party, the bars and clubs can't be beat. The Parte Viejo - old town has a LOT of bars per square foot - mainly yummy tapas bars with some blaring music. The restaurants are amazing - come prepared to EAT! The surfing - while not world-class - is quite good and the water is not too chilly in the summer. Board rentals are plentiful, and it's also a great beach for beginners.
Quick Tips:
If you want to get away from it all and be on a quiet, deserted beach, don't come here in the summer. If you want to play in the surf and sand, and go dancing or drinking till dawn, and then this is the place for you! For surfing, go to Playa Zurriola, a quick 15-minute walk from the main beach, rent a board right on the beach. They'll even hold your bag for you, or you can lock them up in the convenient nearby lockers and showers on the beach. Best Way To Get Around:
The buses are regular and reliable - all the tourists take them. Taxis readily available, too.