Sosua in the Dominican Republic offers surfable conditions year-round, though the best months for consistent waves and favorable winds are typically from September through March. During this period, the swell mix shifts toward a slightly higher percentage of ground swell (23-27%) compared to wind swell (73-77%), providing cleaner, more organized waves with a mean size ranging from 1.3 to 1.5 meters. September and October stand out as the peak months, with the highest likelihood of good wind conditions (56-58%) and manageable swell sizes. The winter months (December-March) also deliver decent conditions, but stronger winds (60-64% bad winds) can sometimes create choppier surf. From May to August, swells are almost entirely wind-driven (86-97%), resulting in smaller, less consistent waves (1.0-1.1m), though August and May have relatively better wind conditions (45-49% good winds). If you're looking for the most reliable and clean surf, September and October are your best bets, offering a solid balance of swell energy, size, and wind stability. The rest of the year can still provide surfable days, particularly for those comfortable with wind swell and variable conditions.