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Conditions at Porthleven in October
October: The North Atlantic Wakes Up
October is the true beginning of the best season. The average swell height jumps to around 6ft (1.9m) and the average period reaches 10.1s, signaling the return of long-period Atlantic groundswell. The wave rose shows W (21.9%), WSW (17.2%), SW (10.0%), WNW (8.8%) and SSW (4.7%), giving a much more balanced and ideal S-to-WSW distribution than the summer months. This is proper surf for Porthleven.
The wind caveat is real, however. SW (10.1%), SSW (9.4%), WSW (9.6%), W (8.2%), S (7.5%) and WNW (8.2%) dominate the wind rose, so onshore and cross-onshore winds are frequent. Ideal offshore wind is only 16% for the month. The best days occur when a low-pressure system exits and high pressure builds behind it, producing clean N/NE flow over solid autumn groundswell.
Water temperature sits at 14.7°C, air averages 13.7°C, and precipitation rises to 3.32 mm/day. October is the month to start watching the forecasts seriously; the first genuine heavy swells of the season are often the most exciting.
Average Spot conditions at Porthleven in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Porthleven during October. 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 October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Porthleven for October. 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.