The warm waters and productive reef areas of Costa Rica make excellent conditions for billfish. While Blue Marlin can be found all along the coast, you can note their migration patterns by season, with August to December seeing many Blue Marlin in the south, Jaco and Quepos experiencing high season from September to December and the northern areas of Playa Flamingo and Tamarindo most frequented by Blue Marlin from November to March.
Some of the most famous Blue Marlin fisheries include the Los Suenos marina, Golfito and Drake's Bay. Frequented also by Black Marlin and Striped Marlin, going out of Los Suenos makes it possible to achieve a billfish 'Grand Slam'.