The best time to go to San Juanillo, Guanacaste, Costa Rica, is during the dry season, which runs from December to April. This period offers consistent sunshine and pleasant temperatures, making it ideal for enjoying the beaches and outdoor activities.During these months, you'll experience minimal rainfall, typically clear skies, and calm ocean conditions great for swimming, snorkelling, and fishing. The average daytime temperature hovers around 30°C (86°F), with cooler evenings. The roads, especially those unpaved, are also in their best condition, making travel to and from San Juanillo much more straightforward.For those looking to avoid the larger crowds and potentially find better value on accommodation while still enjoying good weather, the shoulder months of May and November can also be a good option. You might encounter occasional afternoon showers, but these are often brief and help to refresh the landscape.