Tamarindo's number one activity is surfing, and there are few places in the world that offer such perfect conditions to learn to surf. The waves, while not huge, are very consistent and are ideal for first-timers. Complimenting the surf conditions are numerous surf shops offering lessons, surf board rentals, and surf supplies. Also, especially lately, a few have been offering surf lessons along with complete travel packages.
Kelly's Surf Shop (Also, can handle surf packages and accommodations)
So, if you want to learn to surf, this is the place and the local surf shops make it easy for you.