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.

December in Vanimo delivers consistent surf with an average swell height of 1.2m and a solid period of 10.7s, providing clean, well-formed waves ideal for intermediate to advanced surfers. The swell is predominantly sourced from the NNE and NE directions, with a majority (51.7%) of waves in the 1-1.5m range and a secondary peak (13.4%) in the 1.5-2m range, ensuring good power without being overwhelming. The NW and NNW directions contribute occasional larger sets, reaching up to 2.5m, offering punchier sections for experienced riders. Wind conditions are favorable 44% of the time, with lighter winds from the N to E quadrants (mostly under 20kph) creating clean faces, while stronger W to NW winds (20-30kph) can introduce some chop but are typically manageable. Expect peaky, well-organized waves with a mix of shoulders and hollow sections—ideal for performance surfing when winds align.