How Far Can You Swim Before Drowning

How long can a person swim before drowning?

If a person is submerged after breathing in water for 4 to 6 minutes without resuscitation, it will result in brain damage and eventually death by drowning.

Can a person swim 20 miles?

It will be less if the water is cold, and over-warm water will dehydrate them. So I’d say it’s at least 20 miles, and quite possibly as much as 50 if the conditions were perfect (not to hot, not too cold, etc.)