Supertubos in Portugal is renowned for its powerful, hollow waves, offering some of the best barrel-riding conditions in Europe. The best months for surfing here are typically from October through March, when the Atlantic swell is most consistent and powerful. During these months, ground swell dominates, with frequencies ranging from 66% in October up to 91% in January, ensuring high-quality, clean waves. Swell size averages between 2.1m and 2.7m, peaking in winter (December-February), providing the ideal size for advanced surfers seeking fast, barreling waves. Wind conditions are less favorable overall, but the highest likelihood of good winds occurs in September and October (34-35%), slightly improving the otherwise challenging cross-onshore or onshore winds that prevail (65-75% bad wind conditions across the year). From April onward, the swell quality declines as wind swell becomes more dominant, particularly from May to August, when ground swell drops below 50% and mean swell size diminishes to 1.5-1.7m. These summer months also see the worst wind conditions, making them less reliable for high-performance surfing. While Supertubos can still produce rideable waves year-round, the prime window is unquestionably autumn and winter, when powerful ground swells and slightly better wind chances combine to create world-class surf. September and October can be particularly appealing as they offer a balance of decent swell size, improving winds, and fewer crowds compared to peak winter months.