The best time to visit Merek is typically during the dry season, which runs from May to September.During these months, you'll experience consistently sunny days and lower humidity, making it ideal for exploring the natural beauty of the region. The clearer skies also offer the best views of Lake Toba and the surrounding landscapes, which is a major draw for visitors. This period is superb for outdoor activities like hiking, boating on the lake, or simply relaxing by the water.For those planning to visit during the shoulder months of April or October, you might encounter slightly more rain, but often still enjoy plenty of sunshine at good value.