Duranbah - surf spot statistics

Duranbah in Australia is a surf spot with consistently rideable conditions year-round, but the best months for quality waves and favorable winds fall between May and August. During this period, the percentage of ground swell increases significantly, peaking at 30% in July, while wind swells decrease, providing cleaner and more powerful waves. The average swell size remains steady around 1.5m to 1.7m, offering solid but manageable waves for experienced surfers. Wind conditions also improve in these months, with the highest likelihood of good winds in June and July (36% favorable). Outside this window, from September to April, the spot becomes more wind-affected with a higher proportion of wind swells (up to 88% in November) and less ideal wind conditions (over 80% bad winds in summer months). Swell size slightly drops from September onward, averaging 1.4m, making the waves less consistent and powerful. If you’re looking for the best balance of swell quality and wind, late autumn to mid-winter (May to July) is the prime time, while summer months (December to February) offer smaller, more chopped-up conditions with frequent onshore winds.

August at Duranbah offers fairly consistent surf with an average swell height of 1.4m and a solid 9.2s period, providing well-organized waves with decent power. The swell direction is predominantly from the south to southeast, with the SSE sector delivering the most frequent and sizable waves—10.34% of the time in the 1-1.5m range and 5.70% in the 1.5-2m range, making it the prime swell window. While smaller ENE and E swells also contribute, they’re less powerful. The wind is a mixed bag: clean conditions (offshore or light) occur only 31% of the time, with the most favorable winds coming from the west to northwest (W-WNW), though these directions are less frequent. Unfortunately, onshore S-SSE winds are more common, especially at 10-30kph, which can create choppy conditions. Expect a mix of clean, rippable sessions when winds cooperate and challenging chop when they don’t. Overall, August is decent but not exceptional—best on SSE swells with W-NW winds.