Mangamanu - surf spot statistics

Mangamanu in New Zealand offers surfable conditions year-round, with seasonal variations in swell quality and wind patterns. The best months for surfing are typically from March to August, when ground swells dominate (51% to 59%) and mean swell sizes range from 1.5m to 1.7m. During this period, ground swell consistency peaks, particularly in May (59%) with June and July delivering the largest waves (1.7m). Wind conditions improve slightly in the autumn and winter months (May to July), with good wind days averaging 34%, still outnumbered by poor winds but less severe than summer. The summer months (December to February) see a higher proportion of wind swells (58% to 69%) and smaller waves (1.2m to 1.4m), paired with the worst wind conditions (72% to 73% unfavorable). September marks a transition, with ground swells dropping below 50% but still offering decent wave heights (1.5m). While surfable, the shoulder seasons (September to November and late summer) present more mixed conditions, with weaker ground swells and persistent onshore winds. For the most consistent and powerful waves, target the mid-autumn to mid-winter window when ground swells are strongest and winds are marginally less disruptive.

December at Mangamanu offers surfers a mix of conditions, with an average swell height of 1.2m and a decent period of 9.3s, suggesting generally clean and rideable waves. The swell direction is most favorable from the south (S, SSE, SE), contributing the largest proportion of rideable waves, especially in the 1-2.5m range. These southerly swells provide the best consistency and power, with S swells producing the highest percentage of waves over 1.5m, including occasional bigger sets above 2.5m. ENE and E swells also contribute, though with slightly smaller wave heights. Wind conditions are ideal for surfing 28% of the time, typically when lighter easterly or variable breezes prevail. Stronger northerly and westerly winds (N, NNW, SW) can create choppy or onshore conditions, reducing wave quality. Given the spot's exposure, south swells with light easterly or offshore winds will deliver the cleanest and most surfable conditions. Overall, December provides a good balance of swell activity, though wind plays a key role in determining session quality—early mornings or days with lighter easterly flow are optimal.