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.

December at Boca Barranca offers consistent surf with an average swell height of 0.8m and a solid 13.4s period, indicating well-spaced, powerful waves. The dominant swell direction is from the SSW (47.81% in the 0.5-1m range, 19.53% in 1-1.5m), providing clean, rideable conditions. While smaller waves (0.5-1.5m) prevail, there’s occasional push into the 1.5-2m range (0.08%), though bigger days are rare. Wind is favorable 42% of the time, mostly light (0-20kph) from NNE to SW, minimizing chop. However, stronger NE winds (8.71% at 10-20kph) can occasionally disrupt conditions. Overall, expect fun, mid-sized waves with good shape and minimal wind interference, making it a reliable spot for surfers comfortable with longer-period swells. Pack a standard shortboard or hybrid for the majority of days.