Ferrugem - surf spot statistics

Best Surf Season (May - August)

During the austral winter, the South Atlantic roars to life as mid-latitude storm tracks shift northward, sending consistent long-period swell trains toward the Brazilian coast. Ferrugem, with its east-southeast exposure, lights up as dominant ESE to S swells in the 1.3–1.5m range roll in with periods averaging 9–9.6 seconds — solid, punchy, and rippable. The real game-changer, however, is the wind regime: a high-pressure system anchored over Argentina funnels clean offshore breezes from the WSW through NW quadrant, pushing ideal wind percentages to 65–72%. Expect glassy morning sessions with wave heights often hitting the ‘fun’ to ‘pumping’ categories. This is the window where Ferrugem truly delivers.

Fair Surf Season (April & September - October)

The transition months bring a mix of lingering winter swell and building summer patterns. April still sees decent SSE and S swell contribution (over 25% combined) with an average period of 9.0s, and ideal wind ticks up to 55% as cold fronts pass. September and October see a rise in E and ENE swell (nearly 40% of total) pushing average heights to 1.4–1.5m, but the wind becomes more fickle — ideal percentages drop to 43–50% as the South Atlantic high weakens and northerly quadrant winds strengthen. Surf is rideable, often fun, but you'll need to pick your windows carefully to avoid onshore chop.

Low Surf Season (November - March)

Summer in the Southern Hemisphere brings a persistent high-pressure ridge over the South Atlantic, stabilising the atmosphere and suppressing storm activity. Swell heights average just 1.2–1.3m with periods dipping to 8.0–8.5s — small, grovelly, and often lacking punch. The dominant wind shifts strongly to N through NE directions, blowing directly onshore at Ferrugems east-facing beach. Ideal wind percentages hover around 39–47%, and even then, most offshore flows are light. Waves tend to be short-period windswell or weak groundswell, producing messy, choppy conditions. The occasional E/ENE swell can offer a micro-session, but don't expect the reef to fire. This is the time for a longboard or a trip to the coast of Peru.

September: Spring Instability

September marks a transition back toward summer. Average swell height rises to 1.5m (the highest of the year) but the period drops slightly to 9.2s. The swell direction becomes more easterly: ENE and E combined make up 39.2%, while SE and SSE account for 34.5%. The increase in height is due to stronger but shorter-period east swells, often windswell associated with passing cold fronts. Wind patterns become more erratic: ideal offshore percentage falls to 50%, with N-NNE onshore winds strengthening to 44.2%. The glorious winter consistency begins to fade. Surf can still be good, especially when a fading S swell combines with a temporary offshore wind from the W, but windows are narrower. Expect plenty of days with 1.5–2m east swell, but often accompanied by onshore NE winds that chop up the surface. Pick your days wisely.