Hermanus - surf spot statistics

Hermanus, South Africa, offers consistent surf conditions year-round, with ground swells dominating the wave energy for all months—rarely dropping below 75% prevalence. The swell size increases from the southern hemisphere’s autumn through winter, peaking in June and July with mean heights of 3.0m, supported by the strongest ground swell frequencies (90%+). While wave consistency and size are best from April to August, wind conditions are less favorable during this period, with onshore or poor winds occurring 70-80% of the time. The best compromise between swell quality and cleaner winds falls in late autumn (May) and early spring (September), when ground swells remain strong (2.7m) and good wind probabilities are slightly higher (27% and 17%, respectively). Summer months (December-February) see smaller swells (2.2m) and very low chances of favorable winds (only 11%), making winter the preferred season for advanced surfers willing to battle windier conditions for larger, cleaner ground swells. For most surfers, May stands out as the optimal month with the best balance of size, consistency, and marginally better wind odds.