Pennington Bay - surf spot statistics

Pennington Bay in Australia is a consistent surf spot with year-round swell activity, thanks to its high percentage of ground swell dominance (80%–94% across all months). The best conditions for surfers typically occur from March to September, when ground swell probabilities peak above 90%, and the mean swell size increases slightly to 1.5m–1.7m. However, wind conditions are often challenging, with bad (onshore or cross-shore) winds prevailing 75%–90% of the time throughout the year. The most favorable wind windows appear in the autumn and winter months (April–September), when good wind probabilities reach 22%–25%, slightly improving wave quality. Despite the persistent wind issues, the swell consistency and size make late autumn (May) and winter (June–August) the most promising periods for surfers, especially those who prioritize clean, powerful waves and are willing to take advantage of occasional offshore wind days. The summer months (December–February) see marginally smaller swells (1.4m–1.5m) and the worst wind conditions, making them less ideal for surfing unless you're willing to tolerate choppier waves. Overall, Pennington Bay is a reliable year-round surf destination, but the best balance between swell size and cleaner wind conditions occurs from May to September.

July at Pennington Bay offers consistent surf with an average swell height of 1.7m and a solid 13.3s period, providing well-organized, powerful waves. The dominant swell direction is from the south and southwest, with the best waves arriving from S and SSW—delivering around 50% of swells in the 1-2.5m range, ideal for intermediate to advanced surfers. Wind conditions are less favorable, with only 22% of days offering clean, rideable offshore or light cross-shore winds (typically from the north or northwest). However, winds are often onshore (southerly to westerly), which can create choppy conditions, especially as speeds frequently exceed 20kph. Expect larger swells (2m+) around 12% of the time, mainly from the S/SSW, while smaller, weaker days are rare. Overall, July delivers reliable swell energy but requires patience for optimal wind conditions.