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.

January at Gas Bay delivers consistent surf with an average swell height of 2.4m and a solid period of 12.6s, indicating powerful, well-formed waves. The swell is predominantly from the SW (50.8% of the time, with heights mostly 1.5-2.5m) and S (4.8% of the time, peaking around 2-2.5m), offering clean, rideable waves with good energy. Smaller contributions from SSE and SSW provide variation, though they’re less frequent. Wind conditions are less ideal, with only 11% of days offering favorable winds for surfing—typically light offshore or light cross-shore winds from the N to ENE range. However, moderate to strong onshore winds from SE to SSE are common (30-50% combined occurrence), which can degrade wave quality. Experienced surfers will find the best sessions early mornings before winds pick up, especially when SW swell aligns with lighter winds. Winter wetsuits are advisable due to southern exposure. Overall, January provides solid waves but demands patience to score the cleaner, less wind-affected sessions.