Conditions at Jeffreys Bay in May
May: The Engine Room Turns On
May is where the magic begins. Mean swell height climbs to 10ft (2.9m), period lengthens to 12.2s, and ideal wind skyrockets to 48%. SW swell becomes the dominant energy at 17.9%, SSW at 13.7%, and WSW starts to appear (1.4%), signaling stronger west-angled groundswell. The E/ESE direct window drops to just 2.5%, but the long-period SW swells wrap hard into J-Bay. Wind-wise, W (17.5%), WSW (14.2%), and WNW (8.8%) dominate the rose, with onshore E/ENE decreasing sharply. This combination yields some of the most consistently hollow, fast waves of the year. Water temp is 17.4°C, air temp averages 17.2°C, and it is dry with only 0.91mm/day of rain.
Average Spot conditions at Jeffreys Bay in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Jeffreys 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 Jeffreys Bay for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Jeffreys 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 Jeffreys Bay.