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.

December at Prainha offers decent surf conditions with an average swell height of 1.4m and a solid period of 8.3s, providing consistent, well-formed waves. The majority of swell comes from the east to southeast (ENE to SSE), with peak energy in the 1-1.5m range—ideal for intermediate to advanced surfers. However, larger sets up to 2.5m occasionally roll through, offering more power when the swell peaks. Wind conditions are less favorable, with only 17% of days featuring ideal offshore or light cross-shore winds (typically from the west or northwest). Onshore winds from the northeast to southeast are more common, which can create chop, especially when paired with stronger gusts. For the best sessions, aim for early mornings when winds tend to be lighter, and watch for incoming ENE or E swells with periods above 10s for the cleanest and most powerful waves. While not epic, December delivers rideable surf, though patience with wind conditions is key.