Duranbah - surf spot statistics

Best Surf Season (May - August)

During the southern hemisphere winter, the Tasman Sea comes alive with a consistent diet of mid-period swell from the east and southeast. Average wave periods peak at 8.8-8.9 seconds, delivering punchy, rideable waves in the 1-1.5m range. Most importantly, the wind machine flips in your favor: offshore flows from the SW, WSW, and WNW dominate over 60% of the time, groom the beachbreak and keep the lines clean. This is prime time for Duranbah – smaller but glassy mornings give way to fun-sized rippable waves all day.

Fair Surf Season (March - April & September - October)

In the transition months, the ocean is still active but you have to play the conditions. March and April see slightly larger swell (1.2m average) from the E and ESE, with periods around 8.5-8.6s – solid and rippable. Offshore wind frequencies climb to 43% in April, while September and October offer a mix of clean mornings and building sea breezes. The swell period drops to 7.4-7.8s, meaning shorter, choppier lines unless a storm track aligns. Still, windows of quality exist, especially when a high-pressure system parks over the Tasman Sea and funnels pure westerlies down the coast.

Low Surf Season (November - February)

Summer brings the smallest swell of the year and persistent onshore winds that wreak havoc on wave shape. Average heights hover just over 1m but the average period sinks to 7.3-8.0s, producing weak, short-interval lumps. Worse, the wind is ideal only 20-25% of the time – northeast to east trades blow straight onshore, turning the lineup into a bumpy mess. While occasional tropical lows can spin up a fun SE swell, the odds are stacked against consistently good waves at Duranbah. Expect crowded, choppy days with the occasional early-morning window before the seabreeze kicks in.

August: Late Winter Strength

August holds onto winter’s consistency: ideal wind still at 54%, and swell period a solid 8.5s. Swell height remains 0.9m, but there’s a noticeable increase in NE (6.2%) and NNE (6.6%) swell – not optimal but can produce playful waves if wind cooperates. The primary swell is still from E (19.2%), ESE (20.7%), and SE (17.9%). Offshore winds (SW through WNW) account for 38.8% of all wind, with west and northwest winds contributing over 20%. The occasional early-season cold front can push through, generating a pulse of longer-period swell (10-12s). August is the tail end of the best season – expect clean mornings and a ramping up of afternoon seabreezes as spring approaches.