My brother has been living and surfing in El Salvador for about 3 years now. He's been surfing all up and down latin america, and in Australia and claims that El Salvador has the best surf and least crowded waves. He and a buddy have started a surf tours company. Check their website for info and incredible pictures.
His friend, Vaquero, is probably the best surfer I have ever seen. I've watched a lot of surf videos and seen a lot of surfers, and this guy tops them all.
We went down to visit last february and got to surf on an amazing point break that was perfect everyday we were there for ten days. All the locals were saying how crappy it was too. I can't imagine what it is like when it gets good! Anyway, if you are looking for an affordable place to go for a surf trip this winter, this is the place. Great food, great people, and epic surf. You can go spearfishing too for cheap.
The town they live in has four breaks right there within a five minute walk along the beach. The hotel is right on the beach and has great food and beer for cheap. Oh and by the way, the locals are super friendly and won't harass kayakers for surfing there. You may get poked fun of a bit, but just be courteous and they won't care.