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%).

August at Caldera, Costa Rica, delivers consistent surf with a solid mix of conditions for experienced riders. The average swell height is 1.2m, paired with a robust 14.4s period—indicating powerful, well-spaced waves with good energy. The dominant swell direction is from the SSW (47.5% of waves in the 1-1.5m range), occasionally mixing with SW and S swells, which ensures a reliable, angled push into the break. Wave heights frequently hit the 1-2m range (62% of the time), offering shoulder-high to slightly overhead rides, while 0.8% of days see bigger 2-2.5m sets. Wind conditions are key here: 33% of the time, winds are favorable (light/moderate offshore or cross-offshore), predominantly from the N-NE quadrant, but SSW-SW winds (15-20% occurrence) can create choppy onshore conditions, especially above 20kph. Mornings often see cleaner winds before thermal effects kick in. For advanced surfers, this translates to punchy, fast waves with good shape when winds align, though consistency requires patience—wind swings mean roughly 1 in 3 days are prime. Pack your good-wave board and watch the early windows.