Porthleven
United Kingdom · Atlantic Europe
Porthleven is a notoriously powerful, high-consequence right-hand reef break situated adjacent to the harbour wall on the south coast of Cornwall, United Kingdom. The bathymetry is defined by a shallow, highly uneven slate rock ledge that drops abruptly into deeper water.
Forecast accuracy at Porthleven
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Best time to go
No great windows in the next 2 days
Best available option is Today around 8pm (score: 2). Conditions are below the Good threshold but may still be surfable.
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Session journal
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Last 17 days of logged conditions.
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Create Profile →Frequently asked questions
How often is this page updated?
Current conditions refresh every 3 hours when the cron runs. Hourly data updates every 30 minutes. The 7-day forecast, luck factor, and packing notes are all pre-computed at the same time.
What is the luck factor?
We compare the 7-day forecast to the last 5 years of marine data for the same week at Porthleven. The delta tells you whether conditions are shaping up better, worse, or about the same as a typical mid-May.
How is 'best session' picked?
We score each day of the 7-day forecast using the same algorithm as the leaderboard, and highlight the highest scorer.
Where does the data come from?
Open-Meteo's Marine API (swell height, period, water temperature) and Weather API (wind and conditions).
Does the score capture local knowledge?
Honestly, no. Every break has tide windows, swell directions and reef contours that a global model cannot see. Treat the score as a starting point, then check a local cam.
When is the best time to surf Porthleven?
Check our timing score heatmap above for a week-by-week breakdown combining surf conditions with crowd pressure.