Drowning can happen very quickly, often in under a minute , and in some cases in as little as 20 to 60 seconds. Loss of consciousness can occur in around 2 minutes , and brain damage or death can follow within about 4 to 6 minutes without oxygen.

What matters most

The exact time varies a lot based on age, swimming ability, water conditions, clothing, and whether the person gets help immediately. There isn’t a single “average” that applies to everyone, but the safest takeaway is that drowning is a seconds-to-minutes emergency.

Important safety note

If someone may be drowning, call emergency services right away and start CPR if it’s safe and you know how. Even after rescue, medical evaluation is important because complications can show up later.