While many anglers associate Costa Rica’s dry season with prime fishing, the rainy season (May–November) offers some of the best opportunities for Marlin fishing, especially along the Pacific coast. During these months, the waters come alive with bait, drawing in large predators like Blue and Striped Marlin. Afternoon showers help cool the surface temperatures, creating ideal conditions for deep sea action. Fewer boats on the water also mean less pressure and more rewarding encounters. If you’re looking to target Marlin in Costa Rica, don’t overlook the rainy season—it just might be your best shot at a trophy catch!