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Conditions at Sennen Cove in May
May: Fun-Sized Super-Glide
May is the last true spring surf month before summer settles in. Average swell height drops to 4-5ft (1.4m) with an average period of 9.1s, so there's less power but still plenty of rideable, fun-sized waves. The W/WSW/WNW combo continues to feed the bay - 24.5% W, 17.4% WSW, and 12.9% WNW - but most of that swell is in the 2-5ft (0.5-1.5m) range, perfect for groveling in the corners. Ideal offshore winds remain at 15%, and with warmer air (11.9°C) and water temp climbing to 11.9°C, rubber starts to feel a little more comfortable. The biggest issue is increasing northerly winds: NNW and NW total nearly 17%, and those directions are onshore at Sennen. Score a morning glass-off around low tide and you'll find clean, playful peaks.
Average Spot conditions at Sennen Cove in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Sennen Cove 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 Sennen Cove for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sennen Cove 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 Sennen Cove.