Playa Dominical in Costa Rica is known for its consistent surf conditions year-round, thanks to its exposure to South Pacific ground swells. The data reveals that ground swells dominate throughout the year, rarely dipping below 90%, with almost no days lacking swell. The mean swell size varies subtly, ranging from 0.9m in the smaller months (December-February) to 1.3m during the peak swell season (June-September). However, wind conditions play a crucial role in surf quality here. The best wind conditions (offshore or light cross-shore) are most reliable from December to February, when good wind days hover around 50%. As the year progresses, particularly from March onward, onshore winds become more prevalent, with the worst conditions occurring from May to October, where bad wind days exceed 75%. Despite larger swells from June to September, these months often suffer from unfavorable winds, making sessions less ideal. For surfers seeking the best balance of swell and wind, December through February offers the most favorable conditions, with manageable wave heights and a near 50/50 split in wind quality. March and November are transitional months, still surfable but with increasingly erratic winds. April to October brings bigger swells but poorer wind conditions, making it less consistent for quality surf. Overall, Playa Dominical is a reliable year-round surf spot, but the optimal window for clean, rippable waves aligns with the Northern Hemisphere winter (December-February), when swell consistency, size, and wind conditions harmonize best.