Troia, Portugal, offers a mix of swell conditions throughout the year, with the best surfing months typically being those with strong ground swells and favorable winds. The data shows that winter months (January, February, December) provide the most consistent and powerful ground swells, averaging around 84–91% occurrence, with mean swell sizes peaking at 2.0–2.1m. However, wind conditions during these months are less ideal, with only 34–36% of days featuring good offshore or sideshore winds. The remaining months gradually see a decline in ground swell dominance, shifting toward wind swells, particularly from May to August when ground swells drop to 15–41%. Summer months (June–August) have the smallest waves (1.1–1.2m) and the highest proportion of wind swells, making them less reliable for high-quality surf. Spring (March–April) and autumn (September–November) serve as transitional periods, with ground swells still present but decreasing in power. October and November stand out as solid options with decent ground swells (64–75%) and slightly better wind conditions (34% good wind days) compared to winter. For surfers prioritizing wave power, December through February is the prime window despite the challenging winds. If cleaner conditions are preferred, the shoulder seasons (late September–November) offer a good compromise. Overall, Troia is most consistent in winter, but requires patience with wind conditions, while summer is better suited for beginners or longboarders due to smaller, wind-driven waves.