Vanimo - surf spot statistics

Vanimo, Papua New Guinea, offers consistent surf year-round, but the best conditions for surfers depend on swell quality, wind conditions, and wave size. The optimal months are typically from October to March, when ground swell dominates—especially in October, November, December, and January—with percentages between 44% and 52%. These months also provide the largest mean swell sizes, ranging from 0.9m to 1.3m, making them ideal for powerful, clean waves. Wind conditions improve slightly during these months, with good wind percentages peaking around 44-45% in November and December. The worst wind conditions are from June to September, when onshore winds prevail 63-71% of the time, often ruining wave quality. Swell consistency drops significantly from May to September, with higher wind swell dominance and occasional flat spells (up to 30% no swell in July). For surfers seeking quality waves, the dry season (October-March) is the prime window, combining reliable ground swells, manageable winds, and better wave heights, while the wet season (April-September) sees smaller, wind-affected swells and less favorable conditions.

In May, Vanimo offers surfable conditions with an average swell height of 0.7m and a decent period of 9.3s, providing consistent energy for clean, rideable waves. The swell is predominantly NE (45.54% of waves in the 0.5-1m range), NNE (22.61%), and ENE (2.93%), ensuring well-organized waves with occasional larger sets from the NW/NNW (peaking around 1.5-2m in rare instances). Wind conditions are favorable for surfing 41% of the time, with lighter breezes (10-20kph) from the ESE (10.73%) and E (8.41%) being the most common. However, stronger onshore winds from the E/ESE can occasionally disrupt conditions, particularly when speeds exceed 20kph (9.76% combined). The spot is best suited for intermediate surfers, as wave heights rarely exceed 1.5m, offering manageable but fun rides. Optimal sessions will coincide with lighter winds, especially early mornings before the ESE trade winds pick up. Overall, May delivers reliable, if not outstanding, surf with a mix of clean small-to-medium waves and occasional wind-affected spells.