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.

September at Duranbah offers a mixed bag for surfers, with varying conditions depending on swell and wind alignments. The average swell height is 1.4m with a decent 8.7s period, providing some solid rides, though smaller days are frequent. The most consistent swell directions come from the east (E, ESE, SE, SSE), where waves in the 1-2m range dominate, offering clean, rideable conditions. Larger swells (2-2.5m+) are less common but do occur, particularly from the S and SSE. Wind is a limiting factor—only 25% of the time is it ideal (light offshore or sideshore), predominantly from the W or NW. However, onshore winds from the NE and E are frequent, creating choppy or blown-out waves. For experienced surfers, mornings often provide the best window before winds pick up, especially when swells from the SE combine with lighter W/NW winds. Overall, September delivers variable but surfable conditions, with standout days when swell and wind align properly.