Cottosloe - surf spot statistics

Cottesloe in Western Australia offers consistent surf conditions year-round, though the best months for surfers are typically from April to September. During this period, ground swell dominates (93–96%), with minimal wind swell interference (3–5%) and almost no flat days (0–4%). The mean swell size increases from 1.1m in April to a peak of 1.5m in July and August, providing solid, rideable waves. While wind conditions are less favorable overall (good winds only 25–32% of the time), offshore winds are most reliable in May (32% good conditions), making it a standout month. The winter swell energy is strongest, but the trade-off is worsening onshore winds (68–77% bad conditions). Early autumn (April) and late spring (September–October) offer a balance of decent swell (1.2–1.4m) before summer’s smaller waves (0.9–1.1m) and poor winds (16–23% good conditions) take over. Summer months (December–March) see slightly smaller swells (0.9–1.0m) and the worst wind patterns (77–84% bad conditions), making them less ideal. For surfers prioritizing size and consistency, June–August deliver the biggest waves, while April–May and September provide a sweet spot of manageable swell and slightly better winds.

In November, Cottesloe typically experiences an average swell height of 1.1m with a decent period of 12.8s, indicating well-organized and rideable waves. The swell is predominantly from the WSW direction, contributing the highest percentage of waves, particularly in the 0.5-2.5m range—ideal for intermediate to advanced surfers. However, wave quality can be inconsistent due to frequent onshore winds, as only 18% of wind conditions are favorable (light offshore or cross-shore). Winds are most commonly from the S to SW, often between 10-30kph, which can create choppy or textured conditions, especially in the afternoons. While WSW swells provide the best potential, surfers should watch for early mornings when winds are lighter. The spot rarely sees waves over 2.5m, making it more suitable for performance surfing rather than big-wave riding.