Umdloti - surf spot statistics

Umdloti, South Africa, offers consistent surf conditions year-round but has distinct seasonal variations in swell and wind quality. The best months for surfing are typically from April to August, when ground swell dominates (65-76% probability) and wind conditions are more favorable. During this period, April stands out with 53% good winds, May (61%), and June (66%), making them prime months for clean, rideable waves. Mean swell sizes remain steady around 1.6-1.7m, offering manageable but punchy waves. Late autumn and winter (May-July) are particularly reliable, combining solid ground swells with offshore wind frequencies rarely dropping below 50%. Outside this window, the surf becomes less predictable. From September to March, wind swell takes over (48-65% probability), and onshore winds plague 59-68% of days, disrupting conditions. October and November, despite slightly larger swells (1.8m and 1.6m respectively), suffer from 67-68% bad winds, often ruining wave quality. Summer months (December-February) see a drop in ground swell (37-45%) and poor wind reliability (59-65% onshore), though smaller swells (1.5-1.6m) can still provide fun sessions when winds align. For serious surfers, late autumn through mid-winter (April-August) delivers the most consistent mix of ground swell energy and cleaner winds, while the rest of the year requires patience to score occasional good days.

In May, Umdloti offers decent surf conditions with an average swell height of 1.6m and a solid average period of 11.9s, ideal for generating clean, well-spaced waves. The swell is predominantly from the southeast (SSE, SE, ESE, and S directions), with the majority of waves (over 70% of occurrences) falling in the 1-2.5m range, providing consistent, surfable power. The best quality waves come from the south (S) and south-southeast (SSE), where 15.48% of swells reach 1.5-2m and 6.59% exceed 2m—great for intermediate to advanced surfers. Wind conditions are favorable 61% of the time, with light to moderate speeds (0-20kph) predominantly from the west-northwest (WNW) and north-northwest (NNW), which should keep the surface clean for offshore grooming. However, stronger winds from the southwest (SW) and south (S) may occasionally create chop. Overall, May delivers reliable surf with good size, long-period energy, and a high probability of rideable conditions, especially when winds align favorably.