The best time to visit San Sebastian, Retalhuleu, is during the dry season, which runs from November to April. This period offers pleasant weather conditions, making it ideal for exploring the region's attractions.During these months, you can expect sunny days and comfortable temperatures, which are superb for enjoying outdoor activities. The lower humidity makes walking around and visiting sites like the nearby Xetulul and Xocomil parks more enjoyable for families.While the rainy season, from May to October, does bring lush greenery, it also means more frequent afternoon showers.