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.

May at Stoney Beach offers consistent surf with an average swell height of 2.1m and a solid period of 11.0s, producing well-organized waves. The dominant swell directions are from the SSW, SE, and S, with SSW swells delivering the most significant waves—7.3% of the time in the 1.5-2m range and 7.5% in the 2-2.5m range, occasionally exceeding 2.5m (1%). This suggests powerful, clean walls when the swell aligns. ENE and E swells also contribute, particularly in the 1-2m range, adding variety. Wind conditions are less ideal, with only 19% of days offering favorable offshore or light cross-shore winds (mostly ENE to SE). Stronger onshore winds from the N through W quadrants are common, potentially creating chop, especially with SW and SSW winds. Overall, May provides solid surf, particularly when SSW swells combine with lighter ENE-E winds, but patience is needed for clean conditions. Expect a mix of powerful, well-shaped waves and challenging wind-affected days.