Tramandao - surf spot statistics

Best Surf Season (May - August)

During the austral winter, the South Atlantic roars to life as the storm track shifts northward, slamming the Rio Grande do Sul coastline with consistent, long-period swell. Tramandao, with its ESE-facing beach, is perfectly oriented to capture the relentless energy from SE to E swells. The average wave height sits solidly in the 1.7-1.8m range, with periods stretching into the 9-10s bracket, offering punchy, rideable waves. More importantly, winter also brings the highest percentage of offshore winds—from the west and northwest—as cold fronts and post-frontal high pressure systems sweep across the continent. This combination of clean, groomed swell and favorable wind makes May through August the undisputed power months for surfers. It is not uncommon to score multiple days of 1.5-2.5m surf with glassy conditions as the wind clock around to the WNW.

Fair Surf Season (April & September)

The shoulder months of April and September act as a transition period, balancing the building or fading winter swell window with more variable wind patterns. In April, the autumnal shift begins, with average swell heights climbing to 1.7m and periods reaching 9.1s, while ideal wind frequency jumps to 28%. September sees the last gasp of winter swell, posting the highest average height of the year at 2.0m. However, the wind becomes a bit more fickle, with ideal offshore breezes dropping to 21%. These months can serve up world-class waves when a strong low-pressure system aligns with a westerly wind regime, but you have to chase the forecasts more closely.

Low Surf Season (October - March)

From October through March, the South Atlantic subtropical high strengthens, locking in relentless easterly trade winds. For Tramandao, this is a mixed bag: the swell direction remains favorable—ENE, E, and ESE—but the accompanying wind is almost always onshore, coming from exactly the same quadrant. The result is choppy, wind-affected surf with average wave heights in the 1.5-1.9m range and periods hovering around 8-8.6s. The percentage of ideal offshore wind (WSW through NW) plummets to between 17-23%, meaning clean waves are a rarity. While summer can occasionally produce a fun, grovel-worthy day if a cold front clips the coast, the norm is onshore, bumpy conditions. This is the season to be patient and wait for a rare westerly wind event.

March: The Last Gasp of Summer Consistency

March marks the beginning of the transition out of summer, but the trade winds still hold strong. Average swell height is 1.6m with a period of 8.7s, showing a slight increase in energy. Swell directions shift a bit more toward the SE and S, with E (19.6%) and ESE (18.3%) leading, but also notable contributions from SE (14.9%) and SSE (12.8%). Wind remains predominantly from ENE (24.1%) and NE (18.2%), keeping conditions onshore 77% of the time. The ideal offshore wind percentage stays at 23%. March can produce some fun, punchy days when a secondary swell arrives from the SE, but the onshore wind still limits quality. It's a month of potential and frustration—good if you time the wind shifts perfectly.