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Conditions at Rhossili Bay in May
May: Small Summer Swell and High-Pressure Lull
The North Atlantic storm track begins to retreat in May, and Rhossili feels it. Average swell heights slip to 0.8m (2.6ft), periods shorten to 8.3s, and the swell energy becomes increasingly dominated by shorter-period W/WSW windswell mixed with the last of the spring groundswell. WSW still leads the direction board at 40.4%, and W adds 22.8%, but most of that is in the 0.5-1m range. Offshore winds remain possible, with N through ENE at 16.1% and ideal conditions around 8%, so there are still clean, grovelly days to be had. Air temperatures warm to 11.6°C and water temperatures climb to 12.2°C, making the transition to lighter spring suits a little easier. For bigger surf, you are now reliant on late-season North Atlantic lows or lucky windows of long-period W/SW swell.
Average Spot conditions at Rhossili Bay in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Rhossili 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 Rhossili Bay for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rhossili 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 Rhossili Bay.