Conditions at Troia in December
December: Peak Winter, Peak Consistency
December is arguably the single best month for quality surf at Troia. Average swell height reaches 6ft (1.9m) with an average period of 12.6s - powerful, long-period groundswell with real depth. The directional spread is the best of the year: WNW (28.3%) and NW (26.1%) still dominate, but W holds at 10.8%, WSW at 5.0% and SW at 2.6%, so the optimal SSW-SW-WSW-W window accounts for around 19% of all swell. The variety allows Troia's southwest-facing sandbars to light up on almost every pulse.
Winds align too. Ideal conditions reach 46%, and offshore NNE/NE/ENE/E winds combine to around 35%, with NNW reduced to 12.5%. Frontal systems march through the Atlantic with regularity, yet the inter-frontal easterly spells are frequent enough to keep the beach clean for many sessions. Air temperatures average 11.4°C, water temperature is 15.6°C, and precipitation is high at 2.58mm/day. If you want the full Troia experience - big W/SW groundswell, offshore northeasterlies and winter atmosphere - December is the month.
Average Spot conditions at Troia in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Troia 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 Troia for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Troia 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 Troia.