Caldera - surf spot statistics

Caldera, Costa Rica, offers consistent surf conditions year-round, with ground swells dominating the swell regime (80-87% occurrence) and minimal wind swell influence (0-7%). The mean swell size ranges from 0.8m in the early and late months (January, February, December) to 1.2m in the mid-year period (June-September), making it a solid spot for surfers who prefer smaller to medium-sized waves. The best months for surfing in Caldera are typically November through March, when ground swells remain strong (80-86%), and wind conditions improve slightly, with good wind days occurring 41-48% of the time—significantly better than the mid-year months. December and January are particularly favorable, combining decent swell size (0.8m) with relatively lower onshore wind interference (bad wind days at 52-54%). From April to October, swell height increases, but unfavorable winds become more prevalent (64-72% bad wind days), particularly in September, which has the worst wind conditions (72% bad days). If you prioritize cleaner conditions over sheer swell size, target the winter months. However, if you’re comfortable with stronger winds in exchange for slightly bigger waves, June-August can still work, especially since ground swell consistency remains high (85%).

December at Caldera, Costa Rica, offers consistent surfable conditions with a predominant swell direction from the SSW and SW, generating waves in the 0.5–2m range most frequently. The average swell height is 0.8m, paired with a solid 13.4s period, ensuring clean, well-spaced waves suitable for intermediate to advanced surfers. Over 80% of the swells fall between 0.5–1.5m, with SSW swells (47.81% at 0.5–1m, 19.53% at 1–1.5m) providing the most rideable energy. Wind conditions are workable, with 46% of days offering favorable offshore or light cross-shore flow, primarily from the N/NE quadrant (under 20kph). However, moderate onshore SW winds (7.41% at 10–20kph) can occasionally disrupt surface quality. Expect smaller but groomed waves early in the day before winds pick up—ideal for performance surfing or relaxed logging when conditions align.