To avoid the massive crowds at Siam Park in Tenerife—often voted the world’s best water park—the best strategy is to visit on Sundays or Tuesdays. While weekends are typically busy at most parks, Sundays in Tenerife see a significant "turnover" of tourists arriving and departing the island, often making it quieter than the mid-week peak. Tuesdays are generally lower in attendance compared to Mondays (when weekend arrivals flock to the park) or Thursdays (when locals often take a day off). In 2026, the park’s capacity management has improved, but wait times for the Tower of Power or Singha can still exceed 90 minutes on busy days. Visiting during the "shoulder seasons" of May or October, and arriving at least 30 minutes before the gates open, is the ultimate way to ensure a peaceful experience. For those who can only visit on a busy day, purchasing a "Fast Pass" is almost mandatory to enjoy more than three or four slides, though these are limited in number and often sell out by noon.