The best time to visit the Toronto Zoo depends on your priority: for the most active animal viewing, late spring (May to June) and early autumn (September to October) are ideal. During these periods, temperatures are moderate (typically 10°C to 20°C), making it comfortable for both visitors and the animals, who are more likely to be seen in their outdoor habitats compared to the heat of mid-summer. If you want to avoid crowds, weekdays during the school year are significantly quieter than weekends or summer holidays. For budget-conscious travelers, winter offers discounted admission and the chance to see cold-weather species like polar bears and snow leopards in their element, plus access to five massive indoor tropical pavilions. To maximize your day, arrive right at opening (9:30 AM) when animals are often being fed and are most alert.