How Long Does It Take to Get All Swimming Diplomas? Realistic Timeline for Parents

The question every parent asks: how long does swimming lessons actually take?

You just signed your child up for swimming lessons. The first lesson has happened, the swimsuit is in the bag, and you look forward to the moment your son or daughter can be photographed with a diploma. But a question lingers: how long will this take? Months? Years? And why does it seem to go so fast for one child and so slow for another?

You’re not the only one struggling with this. Parents all over the Netherlands wonder if their child’s swimming progress is on track. Especially when you hear that neighbor girl Emma got her A diploma within a year, while your child has been practicing the breaststroke for a year and a half. This overview shows exactly how long each diploma usually takes, which factors influence the timeline, and how you as a parent can actively help ensure smooth progress.

The Dutch swimming diploma system: A, B, and C explained

What exactly does the A diploma involve?

The Zwemdiploma A is the first official swimming diploma your child can earn. It focuses on basic skills: breaststroke, simple backstroke, treading water, climbing through a hole in a sail, and getting out of the water with clothes on. Your child learns to save themselves in a pool without current. The A diploma is sufficient for recreational swimming in a supervised indoor pool, but it’s not yet safe for open water.

On average, the A diploma takes 12 to 18 months with one lesson per week of 45 to 60 minutes. Children who swim twice a week often get it within 8 to 12 months.

The B diploma: the next step towards independence

After the A diploma, your child moves on to the B level. Here the basic techniques are refined and more endurance is required. Distances get longer, exercises become more complex, and there is more emphasis on swimming in deeper water. The B diploma means your child can swim independently in a subtropical pool with slides and wave pools.

The B diploma usually takes an additional 6 to 12 months after the A diploma. Progress here is often faster because the foundation is already laid.

The C diploma: fully safe swimming in open water

The C diploma is the pinnacle of the Dutch swimming education. Your child learns to handle currents, waves, longer distances, and unexpected situations in open water such as lakes, rivers, and the sea. With the C diploma, your child is fully safe swimming in all Dutch waters. The focus is on survival skills, endurance, and self-reliance in challenging conditions.

The C diploma takes another 6 to 12 months after the B diploma. Many children earn their C diploma around 8 to 9 years old, provided they started around their 5th birthday.

Average timeline at a glance

For an average child starting at age 5 with one swimming lesson per week, the schedule looks like this:

Overview: from start to C diploma

The entire journey from the first swimming lesson to the full C diploma takes on average 2.5 to 3.5 years. Some children take less time, others longer: that’s completely normal. Every child develops at their own pace.

Factors that influence the duration

Your child’s age at the start

The starting age is by far the most important factor determining total swimming lesson time. Children who start between 4.5 and 5 years old usually progress most efficiently. They are motorically developed enough to learn breaststroke but still young enough to move smoothly through the levels. Children who start at 6.5 or 7 years often master the technical skills faster but may take longer on the A diploma because they need to swim significantly more meters during that transition phase.

Lesson frequency: once or twice a week?

This is the factor parents can influence the most. Children who swim twice a week earn their diplomas about 40% faster than those with one lesson per week. Twice a week means the material sticks better and the technique doesn’t fade during the six days between lessons. The downside is it costs twice as much and requires more time in your schedule. Many parents choose a middle ground: twice a week the first year to build a solid foundation, then back to once a week.

Fear of water and confidence

Children who are afraid of water take on average 4 to 8 months longer to get their A diploma. The fear must be overcome before working on technique. This is not wasted time: building water confidence is the most important foundation for all swimming safety. A child who enters the water confidently learns faster and more thoroughly than one who participates reluctantly.

Individual motor development

Some children naturally have better coordination and body awareness than others. Breaststroke requires simultaneous arm and leg movements in a specific rhythm. Children who are motorically slower take longer to learn this. The transition to simple backstroke can also be a stumbling block because it requires a completely different coordination pattern. This is no cause for concern: it just means your child needs more time and repetition.

Swimmigo: see exactly how far your child has come

One of the biggest frustrations for parents is the lack of insight into swimming lesson progress. You get a paper with a checkmark every few months, but what it really means remains vague. Swimmigo solves this by giving you real-time access to your child’s digital logbook.

Track progress per exercise in real time

In Swimmigo’s parent portal, you see exactly which of the 86 skills your child has mastered and which are still in progress. The instructor gives scores after each lesson using a 0 to 6 smiley system, and you see them immediately in the app. No more surprises at the next report meeting: you always know where your child stands. You also get a push notification as soon as your child is ready to move to the next level. This keeps you involved without having to sit at the poolside every lesson.

7 levels, 86 skills: see exactly where your child stands

The Dutch swimming path is divided into 7 levels from Red to Gold. Each level contains specific skills your child must master before moving on. Instead of waiting for the semi-annual progress talk, Swimmigo shows you at a glance how far your child has come. Is your child stuck on a specific exercise? Then you can practice that at home. For each level achieved, your child receives a free, personalized swimming certificate with name and date.

Practical tips to shorten total swimming lesson time

Extra practice outside of lessons

Children who go to the pool weekly with their parents to practice progress through levels noticeably faster. It’s not about learning new techniques—that’s the instructor’s job—but maintaining what’s already learned. An hour of free swimming per week where your child practices breaststroke or treading water helps the material stick. Many pools offer affordable family subscriptions for this purpose.

Use vacation mode for continuity

Summer vacation is traditionally when swimming progress loses the most ground. Six weeks without lessons often means taking two steps back. Swimmigo has a vacation mode so you can check off exercises yourself during summer. Going to a holiday pool or lake with the family? Open the app, see which exercises your child was working on, and have them repeat those in the holiday pool. This keeps progress intact and prevents your child from starting behind after vacation.

Choose the right swimming school with small groups

Group size measurably affects completion time. In a group of 4 to 6 children, each child gets significantly more personal attention from the instructor than in groups of 10 to 12. On average, this saves 10 to 20% of total time per diploma. Feel free to ask about average group size and how often a child actually gets to practice during a 45-minute lesson at intake.

Conclusion

The path to the full C diploma is different for every child. On average, expect 2.5 to 3.5 years from the first lesson to the final certificate. The biggest factors parents can influence are starting age, lesson frequency, and practicing at home in the pool. With tools like Swimmigo, you always have insight into your child’s progress, so there are no surprises at the next report meeting. Trust your child’s pace: swimming safety is more important than speed.

Want to know more about swimming progress? Check out these pages:

• The 7 levels of Swimmigo: Red to Gold
• How Swimmigo works for parents and swimming schools
• All features of Swimmigo at a glance
• Swimmigo for swimming instructors and schools
• The free student tracking system for swimming lessons

Sources

• World Health Organization: drowning, facts and figures, 2026
• World Health Organization: drowning as a health topic, 2026
• Swim England: Learn to Swim, 2026