The best time to visit Loiu is during the late spring (May to June) and early autumn (September to October) when the weather is pleasantly mild and the region is less crowded.May and June offer comfortable temperatures, usually ranging from 15°C to 22°C, which are superb for exploring the Basque countryside and enjoying outdoor activities without the peak summer heat. The landscape is lush and green, and you'll find fewer tourists compared to July and August, allowing for a more relaxed experience.September and October also provide excellent conditions. The summer crowds have dispersed, but the weather remains agreeable, typically between 18°C and 25°C. This period is ideal for those who appreciate cultural events, as many local festivals celebrating Basque traditions and harvest often take place. The changing autumn colours also add to the scenic beauty of the region.While July and August are warm and sunny, with temperatures often exceeding 25°C, they are also the busiest months. If you prefer a lively option and don't mind larger crowds, this can still be a good time to visit, especially if you plan to spend time at the nearby coastal towns.