Prainha - surf spot statistics

Prainha, Brazil, offers consistent surf year-round, though the best conditions typically occur between May and August. During these months, ground swell makes up a larger portion of the swell mix (38% in May and June, decreasing slightly towards August), leading to cleaner, more organized waves. The mean swell size hovers around 1.5–1.6m, providing solid, rideable waves without being overly heavy. Wind conditions are also more favorable in these months, with May, June, and July seeing the highest percentage of good winds (28%, 28%, and 25%, respectively), reducing the chances of onshore chop. The rest of the year is dominated by wind swell (peaking at 87% in December and January), which can create less predictable and sometimes messier waves. September through December sees a steep drop in favorable wind conditions, with bad winds peaking at 86% in September and October, making these months less reliable. Swell size remains decent in the shoulder seasons, but the increased wind interference lowers overall quality. For surfers seeking the most consistent and clean conditions, the May-to-August window is ideal, offering a balance of ground swell and manageable winds.

In May, Prainha offers decent surf conditions with an average swell height of 1.5m and a solid average period of 9.8s, indicating well-formed and powerful waves. The swell primarily arrives from the SSE, S, and SE directions, with the majority of waves ranging between 1-2.5m, providing consistent surfable conditions. Around 28% of the time, wind conditions are ideal—typically light offshore or sideshore winds from the ENE to E sectors, which help shape the waves cleanly. However, stronger onshore winds from the SW to W can occasionally disrupt conditions, particularly at higher speeds. Surfers can expect a good balance of rideable waves, though wind quality is variable. Overall, May delivers reliable surf with some excellent sessions when wind and swell align.