Ferrugem - surf spot statistics

Ferrugem in Brazil offers consistent surf year-round, but the best conditions typically occur between May and September. During these months, the swell is predominantly groundswell (peaking at 42% in May and June), which provides cleaner, more powerful waves compared to the windswell-dominated conditions in other months. Mean swell size also increases slightly, averaging around 1.6-1.7m, with May to August delivering the most reliable wave heights. Wind conditions, however, remain challenging throughout the year, with bad winds (onshore or cross-shore) dominating over 70% of the time. The least unfavorable winds occur from May to July (25-26% good wind days), though even then, clean conditions are relatively rare. September stands out with the largest average swell size (1.9m) but suffers from the worst wind conditions (only 14% good wind days). From October to April, the surf is smaller and more windswell-driven, with January, February, and December showing the weakest groundswell influence (16-19%) and the highest frequency of poor winds (79-87%). Overall, mid-year (May-August) provides the best compromise between swell quality and size, though surfers should be prepared for frequent onshore winds. Early mornings or sessions following wind shifts may offer brief clean conditions, but consistent offshore breezes are rare at this spot.

August at Ferrugem offers consistent surf conditions with an average swell height of 1.7m and a solid period of 9.6s, ensuring well-formed, powerful waves. The primary swell directions are from the east and southeast, with ENE, E, and SE swells making up the bulk of the surfable conditions (around 6–7% each in the 1–1.5m range). The most favorable wave sizes (1.5–2.5m) are predominantly from the south and southeast, with S and SSE swells contributing the largest waves—over 15% of the time in this range, including powerful sets up to 2.5m+. Wind conditions are less ideal, with only 18% of days offering clean surfing conditions. Strong NNE and N winds are common (often 20–40kph), creating choppy or cross-shore wind patterns that can disrupt wave quality. However, lighter ENE or SE winds (below 20kph) occasionally align for cleaner sessions. Overall, expect punchy, sizable waves with periods of good shape, but be prepared for variable wind interference. Intermediate to advanced surfers will find the most opportunities, especially when south swells combine with lighter offshore winds.