- Home
- ...Europe
United Kingdom- Porthleven
Conditions at Porthleven in March
March: Winter Power With a Spring Twist
March is the last true winter month in the wave data. Average swell height is around 7ft (2.1m), with a period average of 11.2s, so Porthleven is still seeing solid, powerful groundswell. The swell rose remains W-heavy: W (22.8%), WSW (14.8%), WNW (11.3%) and SW (7.2%). There is plenty of energy in the water, and the W/WNW biases mean the bay may have some extra side-offshore texture, but the sheer size keeps things interesting.
The wind regime begins to shift. Ideal wind percentage climbs to 19%, and while SW/WSW/W winds still total nearly 27% combined, there is a noticeable increase in NNW (8.5%), NNE (3.6%) and E/ENE/NE flow. The offshore N/NNE/NE/ENE quadrant sits around 16% for the month. This makes March a better bet than January or February for combining real size with at least a few cleaner, more organised sessions.
Air temperature averages 9.0°C, water is 9.2°C, and rainfall drops to 2.42 mm/day. March is the last serious chance for deep-winter-style surf before the spring transition takes full hold.
Average Spot conditions at Porthleven in March
Swell history for March
Wind history for March
Swell quality
Analyze the groundswell consistency at Porthleven during March. 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 March.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Porthleven for March. 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.