Not applicable to this non-existent castle. The best time to visit Marken village is spring or early autumn for pleasant weather and fewer crowds.
As there is no "National Marken Castle," this question pertains to Marken village generally. The best time to visit Marken is during the spring (April to June) or early autumn (September to October). During these periods, the weather is typically mild and pleasant, suitable for walking and exploring. There are also fewer crowds compared to the peak summer months (July and August), allowing for a more relaxed experience. During summer, Marken can become very busy with tourists. Winter visits are possible but can be cold, and some services might have reduced hours.