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.

January at Duranbah offers decent surf conditions with an average swell height of 1.6m and a solid period of 8.8s, providing consistent, well-formed waves. The dominant swell direction is from the east (E, ESE), contributing the largest share of rideable waves, particularly in the 1-2.5m range. This makes for reliable surf, though conditions can vary in size and quality depending on wind. Offshore winds—crucial for clean waves—occur only 14% of the time, mostly from the west or northwest, but the most common winds are onshore or sideshore from the northeast to southeast, which can create chop. The swell distribution shows that most waves are in the 1-2m range, with larger sets occasionally pushing over 2.5m, offering some powerful sessions for advanced surfers. Wind speeds are frequently in the 10-30kph range, so mornings or wind-shifted days will provide the best opportunities for cleaner conditions. Overall, expect surfable waves most days, but ideal, glassy sessions will be less frequent due to prevalent onshore breezes.