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.

October at Prainha offers consistent surf with an average swell height of 1.6m and a solid period of 8.7s, providing well-formed waves. The majority of swell comes from ENE to SSE directions, with the most frequent wave heights in the 1-2m range—ideal for intermediate to advanced surfers. ENE and E swells dominate, delivering clean, organized waves, particularly in the 1-1.5m and 1.5-2m brackets. Wind conditions are less favorable, with only 14% of days offering ideal offshore or light cross-shore winds. The prevailing NE to ENE winds often blow onshore at moderate speeds (10-30kph), which can degrade wave quality. For the best sessions, watch for rare days with SE or E winds under 10kph to groom the swell. The spot handles larger days (2-2.5m) well, but wind interference becomes a bigger issue. Overall, October is reliable for surf, though wind luck is key.