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Conditions at Porthleven in April
April: The Spring Clean-Up
April marks a clear step down in size but a significant step up in quality. Average swell height drops to around 5ft (1.6m), with an average period of 10.1s, still enough for genuine groundswell. The swell distribution remains W (23.4%), WSW (17.4%), WNW (12.1%) and SW (8.5%), so the southwest-facing bay continues to see consistent swell exposure, just with less brute force than winter.
The wind story is much more promising for clean surf. NNW is actually the most common wind direction at 10.5%, with E at 9.2%, WNW at 7.9% and W at 7.3%. The N/NNE/NE/ENE offshore quadrant contributes around 19.4% of observations, and the ideal wind percentage jumps to 25%. This is the most consistent clean-wind month since the start of the season.
Water temperature is 10.2°C, air averages 10.0°C, and rainfall is 2.26 mm/day. April delivers clean, shapey waves with less intensity, making it a great month for racking up waves rather than fighting for your life.
Average Spot conditions at Porthleven in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Porthleven 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 Porthleven for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Porthleven 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 Porthleven.