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.

January at Cottesloe offers mixed conditions for surfers, with an average swell height of 1.0m and a solid period of 12.5s, suggesting generally clean and well-spaced waves. The dominant swell direction is from the WSW (47.28% of waves in the 0.5-1m range), which aligns best with the break, providing the most rideable conditions. Larger swells (1.5-2.5m) from the WSW also occur but are less frequent. Wind conditions are less favorable, with only 17% of winds being ideal for surfing, typically light offshore breezes. However, the most common winds are from the S-SSW, often blowing at 10-30kph, which can create onshore chop and reduce wave quality. Expect smaller, manageable waves for most of the month, with occasional larger sets when WSW swells push through. The best sessions will depend on timing lighter winds with incoming WSW energy.