Conditions at Calais in May
May: Peak NNE Swell, Minimal Size
May sees the highest percentage of NNE swell all year at 30.2%, with N and NNW adding more, so the swell direction is largely favorable for this shoreline. However, average height drops to about 2.3ft (0.7m) and the period to 5.1s-a recipe for small, grovelly, short-period surf. Dominant winds are SW at 18.1% and NE/NNE near 13% each, with only 5% ideal offshore wind. Water temperature warms to 12.5°C and air to 12.1°C, making the occasional waist-high clean wave more comfortable as spring fully arrives.
Average Spot conditions at Calais in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Calais 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 Calais for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Calais 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 Calais.