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Conditions at Llangennith in May
May: Small Summer Pulse and the First Warm Breezes
May is the beginning of the low season in earnest. The average swell height slips to 2.5ft (0.8m) and the period drops to 8.3s, meaning most waves are short-period and relatively weak. The swell rose still shows WSW dominance at 40.4% and W at 22.8%, but most of that western energy is under 3ft (1m), with only a small fraction exceeding 5ft (1.5m). Wind becomes more variable: the offshore NE-E window remains solid at around 26% of the total wind rose, but the ideal percentage falls to 8% as sea breezes and summer westerlies increase. Air temperatures rise to 11.6°C, water hits 12.2°C, and rain is at a seasonal low of 2.24mm/day. The best May days are clean, small and fun, with a high-pressure offshore flow grooming waist-high swell. It is a good month for beginners or for logging easy summer waves, but serious surfers will be looking at longer-range forecasts for the Atlantic.
Average Spot conditions at Llangennith in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Llangennith 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 Llangennith for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Llangennith 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 Llangennith.