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Conditions at Cardoso in December
December: Summer Grovel Season
The annual cycle closes with Cardoso in full summer mode. Average wave height eases to 1.6m (5-6ft), average period bottoms out at 8.4s, and S/SSW/SW energy is back down to 10%. ENE/E/ESE trade swell dominates the spectrum at around 57%, bringing inconsistent, short-period lines that don't align with the beach's south-facing layout. The good news is that offshore NNE/NE wind remains well represented at 44% combined, and ideal conditions clock in at 26% - better than spring. Water temp is 22.7°C, air 23.6°C, and rain picks up to 4.11mm/day. December is a grovel month, but a passing frontal low can still throw a rare S swell into the mix.
Average Spot conditions at Cardoso in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Cardoso 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 Cardoso for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cardoso 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 Cardoso.