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%).