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%).

In May, Caldera, Costa Rica, offers surfers consistent but relatively modest conditions. The average swell height is 1.1m with a strong period of 14.9s, indicating powerful, well-spaced waves. Most swells come from the SSW direction (72.5% of waves in the 0.5–2.5m range), with SW also contributing smaller but rideable swells. Over 90% of waves are between 0.5m and 2m, making it ideal for intermediate surfers, though larger sets (2–2.5m) are rare. Offshore winds (ideal for surfing) occur 32% of the time, primarily from the NNE to NE directions, helping groom the surface. However, onshore winds (SSW to SW) can occasionally disrupt conditions, especially when exceeding 20kph. Expect mornings to be cleaner before thermal winds pick up. Overall, May delivers fun, mid-sized waves with decent consistency, though wind management and timing are key for optimal sessions.