What Age Can Kids Start Scuba Diving? Agency Limits and Readiness

What is the minimum age for scuba diving?

Eight for a supervised pool session, 10 for a junior certification. PADI's Bubblemaker and Seal Team programmes and SSI's Try Scuba all start at 8 and stay in a pool or confined water. PADI and SSI both certify from 10, as Junior Open Water Divers. BSAC in the UK also starts junior training at 10.

CMAS works differently. Its children's programme, Bronze Dolphin, starts at 8 with written parental consent, but the adult entry course, One Star Diver, has a minimum age of 14. In between, a child builds depth in stages under a CMAS instructor trained in children's diving.

Local rules can be stricter than any agency. On the Great Barrier Reef, Dreamtime Dive & Snorkel states that by law the minimum age for its dives is 12. How junior cards fit into the wider course ladder is covered in dive certification levels explained, and more training articles sit under Training & Certification.

Age and depth limits by agency

The table gives each agency's published limits. The depth is a maximum for that age, not a target, and instructors are expected to stay shallower when the child or the conditions call for it.

What changes at 14 and 15?

Most of the junior restrictions end at 15 with PADI and SSI and at 14 with CMAS and BSAC. In the standards above, nothing changes at 16 for ordinary diver training; BSAC's age-16 rules cover boat handling and compressor courses.

With PADI, a Junior Open Water Diver becomes an Open Water Diver automatically at 15, with no extra course. Any replacement card or eCard bought from the day after the 15th birthday shows the adult certification. The limits become the adult ones: 18 m (60 ft) as an Open Water Diver and 30 m (100 ft) after Advanced Open Water, diving with a buddy rather than a certified adult. SSI certifies students under 15 as Junior Open Water Divers, so its junior rules also stop at 15.

CMAS lets 14-year-olds start the One Star Diver course with parental consent, with a 200 m swim test and a 20 m limit. BSAC removes its training limits at 14, although a responsible adult must be present whenever under-18s dive.

A birthday changes the card, not the diver. Training, judgement and experience stay where they were, and a Spanish paediatric review still grades 12-16 as an age for diving according to the child's abilities.

Is scuba diving safe for children?

The injury data that exist are reassuring, but there is not much of it. A DAN article on children and diving calls paediatric injury data very scarce, notes that injuries reported through the DAN Emergency Hotline rarely involve children, and says the limited agency statistics give no cause for alarm. A 2025 review in Archives de Pédiatrie found no uniform international recommendations and little evidence-based data, so countries and agencies advise quite differently.

Shallow is not automatically safe. The only prospective paediatric study the Spanish review found followed 205 children aged 8-13, diving to 5-10 m, for five years. It recorded four ear injuries and one blackout caused by hyperventilation, and no effect on growth or hearing, although a quarter of the group dropped out each year. A French case report describes a 13-year-old who, on his first dive in the Mediterranean, suffered a lung overexpansion injury with arterial gas embolism.

How children's bodies handle diving differently

Four differences come up in every medical source, and each one points to shorter, shallower, warmer dives.

• Ears. Children's Eustachian tubes are narrower, shorter and more horizontal, and ear infections and enlarged adenoids are common. The Spanish review names ear injuries as the most common diving accidents in children. A child who can't clear easily needs slow descents and permission to stop. Our guide to equalizing your ears covers the techniques.
• Lungs. In a German study, 41 children aged 8-14 made one pool dive, and 5 of them (12.2%) showed a fall in FEV1 of more than 10%. In another, 16 healthy children aged 10-13 dived to 1 m and 8 m in open water, and 3 had drops over 10%. The authors of the pool study concluded that children with asthma or bronchial hyperreactivity should not dive. The Spanish review treats asthma under 12 as an absolute contraindication.
• Cold. Children lose heat faster because of their surface area relative to body mass. In a study of nine children on 25-minute dives to 8 m, heart rate fell by 24% on average, with a further drop near the end that the authors linked to mild hypothermia. Fit a proper wetsuit (see our wetsuit thickness guide) and end the dive when the child is cold.
• Growth plates. Bones grow from cartilage-rich growth plates until about 18, and some worry that bubbles could damage them. DAN says no evidence of this injury exists in young divers, and dive physician Simon Mitchell told DAN he was unaware of a single case of growth problems in a limb caused by decompression sickness in a teenager.

Does a child need a medical check before diving?

Every programme starts with a medical questionnaire, and a yes answer means a doctor's sign-off. CMAS requires the medical form set by the national federation. In Spain, according to the Spanish review, junior divers need a medical certificate from a doctor trained in paediatric diving medicine. The UK Diving Medical Committee warns that assessing children's fitness to dive is very complex, and that some medical referees may not feel it is appropriate to do it.

Some conditions rule children out more often than others. Margo Peyton, founder of Kids Sea Camp, told DAN that asthma, ADHD and morbid obesity commonly disqualify children. The Spanish review lists ADHD and panic disorders as contraindications, and SSI mentions asthma and ear problems as reasons for a medical evaluation.

Dive physician Simon Mitchell makes a point parents often miss: readiness is largely judged by the instructor who watches the child in the water, not by the doctor.

How to tell if your child is ready

Age sets the minimum. Readiness is about how the child thinks and behaves. Emergency and hyperbaric physician David Wakely, quoted by DAN, notes that children aged 7-11 solve problems about real objects and events, while abstract thinking about situations that have not happened yet does not appear in most children until 11-15. Diving problems are exactly that kind of situation. A 2020 DAN article adds that most children will not grasp a subtle symptom and may be slow to report it.

These questions combine the checklist endorsed by the Spanish Society of Paediatric Pulmonology with PADI's parent questions, as published by DAN Southern Africa. If the honest answer to any of them is no, wait and ask again later.

• Does the child want to dive, or do you, their friends or a sibling want it for them?
• Can they swim at least 25 m without equipment? That is also the CMAS Bronze Dolphin entry test.
• Do they have the attention span for a pool briefing and an open water briefing?
• Can they follow rules and instructions reliably?
• Will they tell an unfamiliar adult that something hurts or feels wrong?
• Can they recognise when they are frightened, and stay calm when stressed or frustrated?
• Can they talk through a what-if question, such as what to do if they lose sight of you?

What the supervising adult has to do

The adult is the safety system, not a buddy. The rules assume it: PADI's 10- and 11-year-olds dive with a professional or a certified parent, SSI juniors with a professional or certified adult, and BSAC juniors under the direct supervision of an adult. During training the ratios tighten too. PADI allows at most four students per instructor when 10- and 11-year-olds are in the group, with no more than two of them that young, and the CMAS Bronze Dolphin standard allows two children per instructor in open water.

DAN's experts explain why. Many young divers lack the strength and skills to be responsible for another diver's life, and a child should be paired with an adult experienced enough to handle a short attention span, who watches the child's gas, depth, position and rate of ascent throughout. The Spanish review recommends one or two experienced adults per child, short and low-risk dives (no night dives, caves or wrecks) and a maximum of 10 m.

• Plan the dive shallower than the card allows, and keep it short.
• Stay within arm's reach and check the child's gauge more often than your own.
• Control the ascent yourself, holding the child if needed.
• End the dive at the first sign of cold, ear pain or distraction.
• Before booking, ask the operator whether oxygen and first aid are on board, whether the staff are active professionals, what depths and conditions to expect, and whether the instructors have taught children before. Those are Margo Peyton's questions in the DAN article.