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Conditions at South Wall Ballina in May
May: Southern Ocean Power Starts to Arrive
May is where the seasonal gears really begin to turn. The average period climbs to 9.5s, and SSE becomes the single dominant swell direction at 24.9%, followed by SE (20.7%) and ESE (18.6%). S swell more than doubles to 6.1%, and the amount of energy in the 5-8ft (1.5-2.5m) range is noticeable. Water temperature falls to 23.2°C, rainfall holds near 3.46 mm/day, and the air is drier and more comfortable.
The wind quality steps up, with ideal offshore flow 39% of the time. Westerly and northwesterly winds are increasingly common, and early-morning glass is frequent. Onshore S/SSE winds still appear but are lighter and less persistent. This is the point of the year when the trade-swell and groundswell mix shifts toward longer, more powerful lines.
Average Spot conditions at South Wall Ballina in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at South Wall Ballina during May. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at South Wall Ballina for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at South Wall Ballina for May. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at South Wall Ballina.