Boca Barranca - surf spot statistics

Boca Barranca in Costa Rica is a renowned river-mouth point break that offers long, peeling left-hand waves, heavily dependent on ground swells for quality surf. Analyzing the monthly averages, the best time to surf here is during the dry season, particularly from **December to April**, when ground swell consistency is high (80-87%), and swell size is manageable, averaging 0.8m to 1.0m. This period also sees slightly better wind conditions, with favorable winds occurring 37-44% of the time, though onshore winds are still frequent. The peak months for reliable ground swells are **February to May**, with March and April offering the best balance between swell size (0.9m-1.0m) and consistency. However, wind conditions are less ideal during these months, with bad winds prevailing 60-65% of the time, meaning early mornings often provide the cleanest waves. The wet season (**May-November**) brings larger swells (1.1m-1.2m) but also higher chances of onshore winds, particularly from September onward when bad winds occur up to 68% of the time. September and October see a slight drop in ground swell dominance (81-83%) and increased wind swell influence, which can make conditions less predictable. For surfers prioritizing clean, rideable waves, **December to February** may be optimal despite smaller swell sizes, as wind conditions improve slightly compared to later months. Overall, Boca Barranca is most consistent in the first half of the year, but surfers should expect frequent wind challenges regardless of season. Early sessions are recommended to maximize glassy conditions.

In August, Boca Barranca offers consistent surf conditions with an average swell height of 1.2m and a strong, well-spaced period of 14.4s, indicating powerful, clean waves. The swell predominantly comes from the SSW (47.5% of waves in the 1-1.5m range) and SW (9.8% in the 1-1.5m range), ensuring long, peeling rides suited for intermediate to advanced surfers. While smaller waves (0.5-1m) and larger sets (1.5-2m) also occur, the energy and consistency of SSW swells make for high-quality sessions. Wind conditions are favorable 35% of the time, with light offshore or sideshore breezes from the NNE to ENE being ideal. However, SSW and SW winds can occasionally create chop, particularly at higher speeds (10-20kph). Overall, August delivers reliable, powerful waves with enough offshore wind windows to provide excellent surfing opportunities, especially for those comfortable in chest-high to overhead conditions.