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Conditions at Betty's Bay in May
May: The Roaring Forties Turn It On
May is the real turning point. The South Atlantic High has shifted enough to allow a steady stream of frontal systems to roll over the Western Cape, and Betty's Bay data confirms it: average swell height jumps to 8ft (2.5m), period reaches 12.3s, and ideal offshore wind hits 43%. The wind now favors NNW (16.7%), NW (15.6%) and WNW (9.5%), all of which are offshore for this SE-facing coast. Swell direction is led by SW (26.3%), with SSW (12.1%) and a much stronger WSW (11.9%) and W (2.4%) contribution - indicating powerful, long-fetch Southern Ocean groundswell. Waves in the 6-10ft (1.8-3.0m) class are the norm, and quality is high. Air temps drop to 16.3C, water holds at 16.2C, and rainfall rises to 2.04mm/day. This is the start of the money season.
Average Spot conditions at Betty's Bay in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Betty's Bay 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 Betty's Bay for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Betty's Bay 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 Betty's Bay.