Gas Bay - surf spot statistics

Gas Bay, Australia, is a surf spot predominantly driven by ground swell year-round, with minimal wind swell interference and almost no days of flat conditions. The best months for surfing here are typically from April to September, when the swell is both consistent and powerful, with mean sizes peaking at 3.7m in July and August. However, wind conditions are less favorable during these months, with good wind days only occurring around 15-24% of the time—best in May (24%) but still generally challenging. The shoulder months of April and May offer a slightly better balance, with decent swell size (2.7m-3.1m) and marginally improved wind chances (23-24%). While winter delivers the largest and most consistent swell, the high prevalence of onshore and unfavorable winds makes it a demanding period for surfers. The rest of the year, from October to March, sees smaller swells (2.3m-3.0m), but wind conditions remain poor, rarely exceeding 18% favorable days. For surfers prioritizing swell size and consistency over wind conditions, mid-autumn to early winter (April-July) is the prime window, though patience with winds is required. If cleaner conditions are preferred, May presents the best compromise with solid swell and relatively better wind odds, though still far from ideal. Overall, Gas Bay is a powerful, swell-rich spot where surfers must often contend with wind challenges, particularly outside of the May window.

September at Gas Bay delivers powerful, consistent surf with a solid average swell height of 3.6m and a long period of 14.0s, indicating well-organized, high-quality waves. The dominant swell direction is from the SW (11.25% of waves in the 2-2.5m range, 3.16% over 2.5m), with secondary contributions from SSW and WSW—ideal for this spot’s exposure. However, wind conditions are often challenging, with only 14% of days offering ideal offshore or light winds for surfing. The most problematic winds come from the W to WSW quadrant (20-30kph and stronger), which can create onshore chop. Experienced surfers will find the most opportunities when SW swells align with lighter E/NE winds, though larger days demand solid skills due to the size and power. Expect a mix of epic, clean sessions and wind-affected days, with the best windows often early morning before prevailing winds strengthen.