Stoney Beach - surf spot statistics

Stoney Beach in New Zealand offers surfable conditions year-round, but the best months for quality waves generally fall between April and August. During these months, the swell consistency improves, with ground swell percentages peaking at 57-60%, offering cleaner and more organized waves compared to the wind swell-dominated summer months. The mean swell size also increases to around 2.0-2.2m, providing more powerful rides. However, wind conditions remain challenging, with only 17-22% of days seeing favorable offshore or light winds, while onshore or strong winds prevail most of the time. The winter months (June-July) see slightly better wind stats, but surfers should still expect a majority of less-than-ideal wind days. From September onwards, ground swell decreases, and wind swell becomes more dominant again, leading to less consistent conditions. January and December have the highest wind swell influence (66-68%), smaller waves (1.7m), and the worst wind stats, making them the least reliable for good surf. For consistent swell size and better ground swell contribution, target late autumn to early spring, but be prepared for variable winds. Ideal sessions here are rare, so flexibility and local knowledge are key.

August at Stoney Beach brings consistent surf with an average swell height of 2.0m and a solid period of 10.7s, indicating well-formed, powerful waves. The most dominant and productive swell directions are from the SSE to SW, particularly SSW, which delivers the highest percentage of surfable waves (5.47% in the 1.5-2m range and 4.88% in the 2-2.5m range). ENE and ESE swells also contribute with clean, mid-sized waves, making the spot versatile. However, wind conditions are challenging—only 20% of the time is ideal for surfing, with onshore winds (N to ENE) frequently disrupting conditions. Offshore or light winds (SSW to SW) are less common but offer the best windows for clean surf. Expect a mix of small to medium waves with occasional larger sets, but be prepared for variable wind interference. Experienced surfers will find opportunities, especially when the wind aligns favorably with the dominant swell direction.