Skip to main contentSkip to customer reviewsSkip to marine weather for diving
Safety

Sleep and rest and their effect on diving

Site adminFriday, 26 July 2024100 views

How does good sleep affect your diving performance and what is the relationship between fatigue and marine accidents.

A fatigued diver is a diver in danger. Good sleep is not a luxury but a necessity for underwater safety.

The effect of fatigue on diving

Poor judgment
Fatigue impairs your ability to make sound decisions, and this is very dangerous in an environment that requires constant alertness.

Delayed responses
The time between seeing danger and acting increases when you are tired, making it difficult to avoid emergency situations.

Increased risk of fainting in freediving
Fatigue reduces the body's oxygen reserve and increases the likelihood of fainting underwater.

How much sleep do you need

An active diver needs 7 to 9 hours of good sleep. The night of the diving trip, good sleep is a necessity, not an option.

When to refuse diving

  • If you slept less than 6 hours the night before
  • If you feel unexplained fatigue or dizziness
  • If you have not recovered from a previous severe dive

Simple rule

Do not exceed three dives per day, no matter how enthusiastic you are, and take a nap between multiple diving trips.


Comfort is not a weakness, but rather what keeps you able to dive for years.

Tags:#Safety