Cats typically go into heat for the first time when they reach sexual maturity, which is usually around 4 to 6 months of age. However, this can vary depending on the breed, individual cat, and environmental factors. Some cats may start cycling as early as 3 to 4 months old, while others may not have their first heat until they are up to 12 to 18 months old. The heat cycle is influenced by factors such as breed, weight, time of year, and environment. In summary:
- Most cats begin heat at about 5 to 9 months old.
- Some can start as early as 3 to 4 months.
- Others may start much later, around 12 to 18 months.
- Indoor cats with regulated light and temperature may cycle year-round.
This variability means individual cats can experience their first heat at quite different ages.