We were going to go to Tamarindo for our honeymoon too for the surfing but I can't seem to find any flights that go direct to Costa Rica from Cancun Mexico. Everything seem to be a total of 14 hour traveling time or more. Here is a place that we were thinking about.
Paradisus Playa Conchal | Costa Rica All Inclusive Resorts | Costa Rica Resorts
And here is a good link to find surfing places in Costa Rica.
North Pacific Coast (Tamarindo Area) Map, Costa Rica