Troia seasonal overview
Best Surf Season (October - March)
The North Atlantic winter machine fires on all cylinders from October through March, delivering consistent, powerful groundswell to Troia's southwest-facing beaches. Average swell heights peak at 1.9-2.0 m in December and January, with long period waves averaging 12-13 seconds. The combination of strong extratropical lows spinning up in the North Atlantic and a favorable high-pressure ridge often sets up offshore easterly to northeasterly winds, keeping the surf clean and lined up. This is prime time for Troia, when the swell direction aligns from the SSW to W and winds blow from the N to E quadrant, creating perfect offshore conditions. Expect pumping, firing waves in the 1.5-2.5 m range on the best days, with the occasional XL pulse exceeding 2.5 m.
Fair Surf Season (April & September)
April and September are transitional months, offering a mix of fading winter energy and the first hints of autumn activity. Swell heights average around 1.5 m, with periods dropping to 11 seconds. While the Atlantic still sends consistent swell, the wind patterns become less reliable. The percentage of ideal offshore wind ranges from 32-35%, as the trade wind pattern starts to establish. Still, when a solid southwest swell meets a morning easterly breeze, Troia can dish out fun rippable waves in the chest-to-head-high range. These months are a gamble but can reward the patient surfer with uncrowded sessions.
Low Surf Season (May - August)
Summer brings a dramatic drop in both swell size and wind quality. From May through August, average swell heights hover around 1.0-1.2 m with periods sinking to 9-10 seconds, resulting in mostly small, weak, groveling waves. The dominant swell direction shifts to NW, which is not ideal for Troia's SW exposure, and the wind regime becomes dominated by strong northerly and northwesterly winds - onshore or side-onshore for this spot. The ideal offshore wind percentage plummets to 27-31%, leaving only the rare day when a light easterly breeze coincides with a small pulse of southwesterly swell. Overall, summer is a time for longboard or foamies, or just waiting for the autumn return.
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Conditions at Troia in December
December: Peak of the Season
December rivals January as the peak surf month, with average swell height of 1.9 m and period of 12.6 s. Ideal wind reaches 46%, the second highest of the year. Offshore winds from N (10.8%), NNE (9.2%), NE (9.7%), ENE (9.6%), and E (6.2%) dominate, providing frequent clean conditions. Swell is powerful, with WNW (28.3%), NW (26.1%), and W (10.8%) leading, but WSW (5.0%) and SW (2.6%) also contribute. The synergy between strong Atlantic lows and a stable high pressure over Europe often sets up prime surf windows. Expect solid 1.5-2.5 m waves, with XL sets over 2.5 m on the biggest days. December is the climax of the surf calendar at Troia, delivering consistent, high-quality waves for those willing to brave the winter chill.
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.
