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.

April at Pennington Bay offers solid surf conditions, with an average swell height of 1.5m and a decent period of 13.3s, indicating well-organized, powerful waves. The dominant swell direction is from the south and southwest, with the highest frequency of rideable waves (1-2.5m) coming from the S and SSW sectors—these produce the best quality, accounting for over 50% of the swell distribution. Smaller, weaker waves appear from northerly directions but are negligible for surfing. Wind conditions are a mixed bag, with only 23% of the time being ideal (likely light offshore or cross-offshore winds, typically from the NW to NE quadrant). However, moderate to strong onshore winds (10-30kph) from the SE to SW are common, which can degrade wave quality. Surfers should target days with S/SSW swell and lighter NW winds for clean, powerful rides, though patience may be needed due to variable winds. Overall, April delivers consistent, mid-sized waves with occasional excellent sessions.