Female cats are typically in heat for about 4–7 days at a time, but it can range from roughly 3 up to 10 days in most cases, and occasionally even longer.

How long are female cats in heat?

Most unspayed female cats (queens) have an estrus, or “in heat,” phase that lasts around 4–7 days when they are fertile and showing classic heat behaviors like loud calling, extra affection, and restlessness. Many veterinary and pet- care sources describe a broader normal range of about 4–10 days, with some noting that estrus can occasionally be as short as 3 days or extend toward 10 or slightly more depending on the individual cat.

If the cat mates and ovulates successfully, the heat usually ends sooner (often just a few days), but if she does not mate, she may stay in heat on the longer end of that range and then return to heat again after a short break.

How often do heat cycles repeat?

Female cats are seasonally polyestrous, meaning they can have multiple cycles during the breeding season rather than just once or twice a year. If they are not spayed and not pregnant, they may go back into heat roughly every 2–3 weeks during breeding season, so owners can feel like their cat is “always” in heat for much of the spring and summer.

In many regions of the Northern Hemisphere, the main breeding season runs from about February to October, driven by longer daylight hours, but indoor cats exposed to artificial light may cycle at almost any time of year.

Signs your cat is in heat

Typical signs that a female cat is in heat include:

  • Very loud, persistent vocalizing (yowling).
  • Rolling, rubbing, and being unusually affectionate.
  • Raising the hindquarters and treading with back legs when stroked along the back.
  • Increased restlessness and attempts to escape outdoors.
  • Heightened interest in male cats around the home or yard.

These behaviors usually appear and intensify over the first days of estrus and then fade once the heat ends, either because the cycle has completed or because the cat has mated and ovulated.

When to talk to a vet or consider spaying

If your cat seems to stay in heat longer than about 10 days, appears in pain, has vaginal discharge that looks bloody or pus-like, or acts ill in any way, a veterinary check is important to rule out medical problems. Because cats can cycle so frequently and can become pregnant very easily when in heat, most veterinarians strongly recommend spaying if you do not plan to breed your cat, both to prevent unwanted litters and to lower long-term health risks like uterine infection and certain cancers.

TL;DR: A female cat is usually in heat for about 4–7 days, can range roughly 3–10 days, and may repeat this cycle every 2–3 weeks during breeding season if she is not bred or spayed.

Information gathered from public forums or data available on the internet and portrayed here.