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Conditions at Arpoador in December
December: The Summer Lull Arrives
December marks the return of small summer surf. The average swell height drops to 1.1m (3-4ft), the period shortens to 9.7s, and while the directions remain south-ish-SSE 27%, S 25%, SE 21%, ESE 15%-the energy is mostly short-period and less powerful. Ideal wind is 49% with a good share of N/NNE/NE offshore flow, so the surf that does show up is often clean and rippable rather than big and thumping. Water temp rises to 21.9°C and summer rain (7.05 mm/day) keeps the air warm and humid. December is for fun, high-cadence sessions on the inside, not for charging big Arpoador.
Average Spot conditions at Arpoador in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Arpoador 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 Arpoador for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Arpoador 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 Arpoador.