Something is always biting off Guanacaste, but knowing the seasons helps you target the fish you came for. The dry season, December through April, brings calm seas and prime offshore conditions — peak billfish time, when sailfish and marlin move through in force and the bluewater runs flat and clear. It's the busiest stretch, so book ahead.
The green season, May through November, trades some sea state for incredible variety. Mahi-mahi and tuna are at their strongest, the inshore roosterfish bite fires up along the points, and the crowds thin out. Wahoo and snapper show year-round, and even in the wetter months mornings are typically calm and fishable — most rain comes in the afternoon. Before you lock a date, check the current tide and weather for Playa Potrero and review the species and their peak seasons so your trip lines up with the fish you most want to catch.