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Conditions at Dungeons in December
December: Summer Solstice Slumber
December rounds out the year with the quietest average conditions at Dungeons. The average swell height is 7.5ft (2.3m), the period is 11.3s, and the vast majority of the energy comes from the SW (27.0%), SSW (15.6%), S (9.9%) and WSW (7.4%) sectors, mostly in the 5-8ft (1.5-2.5m) size range. This is the classic South African summer swell: plenty of background groundswell but with shorter intervals and less of the XL juice that makes Dungeons famous. Windwise, the SSE regime is at its strongest at 32.2%, with SE at 14.8% and S at 16.1%. Ideal N-NE offshore flow is just 5%, so most days the wind adds an unfavourable texture. The positives are warmer conditions - air averages 19.1°C (13.6-27.1), water 17.1°C - and very little rain (0.42mm/day). If a rogue SSW swell lines up with a rare offshore prediction, December can still offer a magical session, but it is not prime big-wave season.
Average Spot conditions at Dungeons in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Dungeons during December. 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 Dungeons for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Dungeons for December. 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 Dungeons.