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Conditions at Johanna in May
May: The Sweet Spot
This is the peak of the quality window. The average swell reaches 2.6m (8-9ft) with a period of 12.9s, and the distribution shifts further toward WSW (16.8%) and W (4.3%), which is excellent news for a SSW-facing beach - more refracted, heavier, hard-hitting waves. SW still leads the pack at 23.5%, with SSW adding 5.9%. The big-swell share above 2.5m (8ft) is now well represented, especially from the SW and WSW, and the mid-range 1.5-2.5m (5-8ft) is everywhere.
May also delivers the highest ideal-wind percentage of the entire year at 35%. Strong N/NNE flow ahead of passing fronts is a regular feature, and the NNW/NW quadrant is also active, often keeping the surface more workable than the raw S/SW onshore patterns. Rain picks up to 2.63 mm/day and water temp eases to 15.8°C, but the combination of size, period, direction and wind makes this the month to circle on the calendar. It can be heavy, it can be demanding, and at Johanna that is exactly what you want.
Average Spot conditions at Johanna in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Johanna 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 Johanna for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Johanna 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 Johanna.