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.

September at Prainha delivers consistent surf with an average swell height of 1.7m and a solid period of 9.2s, producing well-organized waves. The swell predominantly comes from ENE to SSE, with the most frequent waves in the 1-2.5m range, making it surfable for intermediate to advanced riders. ENE swells (7-9%) combined with E and SSE directions (5-9%) bring the best size and power, often producing clean, punchy waves. Offshore winds (ideal only 14% of the time) are most likely from the W to NW, but cross/onshore winds (NE to SSE) are more common, potentially creating bumpy conditions. Smaller days (0.5-1.5m) occur often, while overhead waves (2m+) are rarer but possible. Wind speeds are typically light-moderate (10-30kph), though stronger gusts from NNE to NE (6-8%) can disrupt conditions. Expect a mix of clean mornings and choppy afternoons. Overall, September offers decent surf, but wind consistency is the main limiting factor—patience and timing will reward surfers with the best sessions.