Conditions at Calais in April
April: NNE Windswell Season
April is the first real springtime pattern. The wave rose flips strongly toward NNE at 25.8%, with NE adding another 11.6% and NNW at 9.6%. That means the north side of the compass is producing most of the waves-a favorable direction for Calais-but the average height falls to around 2-3ft (0.6-0.9m) and periods remain at 5.2s. The ideal offshore wind share drops to 5%, and winds are split between NE/NNE and SW. The result is small, short-period surf with occasional lumpy conditions, but cleaner days are possible between spring showers. Air temperatures average 9.0°C, water is 9.7°C, and precipitation is near the yearly minimum at 1.46 mm/day.
Average Spot conditions at Calais in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Calais during April. 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 April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Calais for April. 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.