The best time to go to Zaanse Schans is during the shoulder seasons of April to May or September to October, or if you prefer warmer weather, July and August.
During April and May, the famous Dutch tulip fields are in bloom, and the weather is generally mild, making it pleasant for exploring the open-air museum. You'll find fewer crowds than in the peak summer months, allowing for a more relaxed visit to the windmills, craft shops, and museums.
July and August offer the warmest weather, which is ideal for enjoying the outdoor attractions and boat trips along the Zaan River. However, this is also the busiest period, so expect larger crowds, especially on weekends. If you don't mind the bustling atmosphere, the longer daylight hours provide ample time to see everything.
September and October offer cooler temperatures and a beautiful autumnal landscape. The crowds begin to thin out, providing a more peaceful experience while still enjoying most attractions.