The number that stops people at the counter is 200. A PADI Open Water Diver certification asks for a 200 metre continuous surface swim, or 300 metres in mask, fins and snorkel. Neither version is timed, and any stroke counts. Alongside the swim sits a 10 minute float or tread in water too deep to stand in, with no swim aids.
So the answer splits in two. Someone who cannot support themselves in deep water is not ready for the Open Water course yet. Someone who swims slowly, badly, or only breaststroke is a different case. PADI's own phrasing on the certification FAQ is modest: "Some swimming ability is required." The water-skills assessment looks at whether you stay calm and self-sufficient on the surface. It is an assessment, not a race.
What does the PADI water-skills assessment involve, and is it timed?
Two pieces, completed at some point before certification. The first is distance: 200 metres swum on the surface without stopping, or 300 metres wearing mask, fins and snorkel. The second is a 10 minute float or tread, using whatever method keeps your airway clear. PADI publishes both on its scuba certification FAQ, and the wording has been stable for years.
What an instructor watches is head position, breathing rate and what happens when your feet lose the bottom. A swimmer who thrashes 200 metres in four minutes reveals less than one who takes twelve and stays relaxed. Speed is not scored. Composure is the whole point of the exercise.
No clock runs on the swim. PADI states plainly that there is no time limit and that any swimming stroke is acceptable. Forum threads and overseas dive-shop blogs keep attaching a clock to it, usually ten or twelve minutes. That number is borrowed from professional-level watermanship, where the swim is timed and scored. At Open Water level no clock runs at all.
You can change stroke halfway, roll onto your back, slow down and keep going. What you cannot do is stand up, grab the wall or hang on a float. Rest happens in the water, on your back, and the swim resumes when your breathing settles. Non-swimmers read the distance and give up before they have understood that.
Can you do the 300 metre version instead?
Yes, and weaker swimmers usually should. Mask, fins and snorkel change the task rather than lengthen it. The mask stops water hitting your face, the snorkel removes the head-lift that breaks most beginners' rhythm, and fins do the propulsion your legs cannot. The distance rises to 300 metres because the kit makes the work easier.
Either version satisfies the same standard, and a pass on one is worth exactly what a pass on the other is worth. If you have a snorkelling background and no front-crawl to speak of, the longer option is the sensible route. Practise it in kit you fit properly, because a leaking mask will undo the advantage.
What is the 10 minute float, and does treading count?
Ten minutes in deep water without touching the side and without buoyancy aids. Treading water counts. So does a back float, sculling with the hands, or rotating between the two as you tire. PADI allows any method, and the point is your airway staying above the surface for the full ten minutes.
This is the harder half for most candidates, and the more honest one. Distance can be ground out by a determined person having a bad day. Ten minutes of staying calm while your legs burn cannot be faked. It rehearses the situation a diver meets at the surface with a flooded mask or a failed inflator, which is why the standard exists.
Can a nervous swimmer try scuba before committing?
Yes. Discover Scuba Diving carries no swim assessment. PADI asks that participants are comfortable in the water and able to maintain themselves at the surface, and a PADI Instructor stays with the group throughout. The pool portion goes no deeper than 6 metres; an optional open water dive is limited to 12 metres. It is an experience, not a certification.
Confined water training at Scuba Evolution runs in a heated indoor pool in Fourways, which removes the variable that undoes anxious beginners more often than depth does. Cold water raises breathing rate before any skill has been attempted, and water strips heat from you far faster than air at the same temperature.
Is there a certification that skips the 200 metre swim?
PADI Scuba Diver. Both it and Open Water Diver require the 10 minute swim and float; only Open Water Diver adds the 200 metre surface swim or the 300 metre snorkel version. PADI sets this out in its own comparison of the two certifications, so the shorter route is a published option rather than a favour from an instructor.
The trade is depth and independence. A PADI Scuba Diver dives to a maximum of 12 metres under the direct supervision of a PADI professional. An Open Water Diver plans and runs dives with a certified buddy to 18 metres. Scuba Diver is a subset of the Open Water Diver course, and the remaining knowledge sections and dives upgrade it later without repeating what you have done.
How do you prepare for the assessment?
Treat it as a six-week project rather than a hurdle on the morning of the course. Pool time beats theory here, and small sessions beat heroic ones.
- Swim slower, not harder. Most failed attempts are breathing failures dressed up as fitness failures. Halve your pace and the distance stops being the obstacle.
- Practise the float first. Ten minutes on your back, once a week, builds more useful comfort than length repeats do.
- Try the snorkel option early. If 300 metres in mask, fins and snorkel comes easier than 200 metres of breaststroke, settle that question weeks before the course starts.
- Get adult beginner lessons if you need them. Learning to breathe on one side is a coaching problem, not a courage problem, and a few sessions with a swimming teacher fixes it.
- Book with time in hand. Signing up for a course starting on Saturday leaves no room to practise anything.
One more habit belongs in that list, and it applies from the first breath underwater: keep breathing. The rule that a scuba diver does not hold their breath outranks every swimming skill on this page.
Sources
- PADI, Become a Certified Scuba Diver FAQs. The 200 metre or 300 metre swim, the absence of a time limit, the 10 minute float and tread, and PADI's statement that some swimming ability is required.
- PADI, What's the Difference Between Scuba Diver and Open Water Diver?. Confirms both certifications require the 10 minute swim and float, and that only Open Water Diver adds the 200 metre or 300 metre swim. Also the course structure of each.
- PADI, PADI Diving Restrictions. The 12 metre limit and direct professional supervision for PADI Scuba Diver, and the 18 metre limit for Open Water Diver.
- PADI, Discover Scuba Diving FAQs. Minimum age, the 6 metre pool limit and 12 metre open water limit, and the water-comfort wording that applies in place of a swim assessment.
Frequently Asked Questions
Can you get scuba certified if you cannot swim at all?
Not at PADI Open Water Diver level. The certification requires a 200 metre surface swim or a 300 metre swim in mask, fins and snorkel, plus a 10 minute float or tread in deep water. Both parts require self-sufficiency on the surface.
Is the PADI swim test timed?
No. PADI states there is no time limit on the swim and that any stroke is acceptable. Timed, scored watermanship belongs to professional-level courses such as Divemaster, not to Open Water Diver.
Can you use fins for the swim assessment?
Yes, in the 300 metre version, which is swum in mask, fins and snorkel. The 200 metre version is swum without aids. The 10 minute float allows no buoyancy aids in either case.
Does floating on your back count instead of treading water?
Yes. PADI permits any method for the 10 minutes. Back floating, sculling, treading or a mixture are all acceptable, provided you stay off the side and use no buoyancy aids.
What happens if you cannot complete the assessment on the day?
The assessment can be completed at any point before certification, so a poor attempt early in a course is not the end of it. Talk to your instructor about repeating it later in the course or after further practice.
Is there a diving certification with no 200 metre swim?
PADI Scuba Diver requires the 10 minute swim and float but not the 200 metre or 300 metre swim. It limits you to 12 metres under the direct supervision of a PADI professional, and it upgrades to Open Water Diver later.
Reviewed September 2026. Devon Ford runs Scuba Evolution, a PADI 5 Star Dive Centre in Glenvista, Johannesburg.
