For the most enjoyable experience at Arenal Hot Springs, the best time to visit is during the dry season, which runs from December to April.During these months, you'll find consistently sunny days and lower humidity, making outdoor activities like exploring the Arenal Volcano National Park and enjoying the hot springs more pleasant. The clear skies also offer the best chances to see the Arenal Volcano itself, which can sometimes be obscured by clouds during the wetter months.While the dry season is ideal, the "shoulder" months of May, June, and November can also be good options. You might encounter occasional rain showers, but these are often brief, and the landscape is lush and green. Plus, these months typically see fewer crowds, offering a more tranquil experience at the hot springs.Travelers looking for vibrant, green scenery and comfortable temperatures will appreciate these months.