Can You Hallucinate During a Long Swim?

Swimming in open water

I’ve been working hard for months to prepare for the “Swim to the Moon” marathon swim in Michigan. For those who do not know, a marathon swim is a 10K swim, not a 26.2 swim.

According to the Long Swims Database, there have been 91,000 marathon swims by 33,000 swimmers from 141 countries.

My Long Distance Open Water Swim Experience

I swam the Maggie Fischer Memorial Cross Bay Swim in 2019. Because of the strong current on the swim day, I swam 7 miles instead of the 5.5 miles.

After COVID and the world reopened, I planned on swimming the marathon swim at “Swim to the Moon” by Epic Races but ended up doing the 5K instead.

I also swam 3 miles at Steelman a year or so ago.

But I never officially swam a 10K. That is why this race has been important to me.

Swimming in the Open Water and the Pool

I’ve been doing my long distance swimming in the open water and the pool. While swimming, I have noticed I am having hallucinations and wondered if I was loosing it. After about 5,000 yards or so, I start to see things on the horizon of the water. I also hear things like people talking or just random sounds. The other day, I even felt like things were on me or touching me. It was a very strange sensation.

After doing some research on the internet, I found that hallucinations are a thing.

Halucination

According to the World Open Water Swimming Association, “it happens from a combination of dehydration, sleep deprivation, and prolonged exposure to saltwater can create a dreamlike state that can lead to hallucinations. These hallucinations can be as vivid as reality and can cause negative reactions. They can involve marine life, imaginary creatures, or a transformation of oneself, one’s crew, or other people in one’s life. For example, record-breaking swimmer Diana Nyad hallucinated during her 53-hour swim from Cuba to Florida, describing seeing a scene from The Wizard of Oz while swimming at night.”

What Can You Do About It?

If you are swimming long and are experiencing hallucinations, here are some tips: