PADI Open Water Certification: Requirements, Cost and What You Learn

PADI Open Water Diver is PADI's entry-level scuba certification. To earn it you need to be at least 10 years old, pass a simple swim and float test, fill out a medical questionnaire, and complete three parts: knowledge development (usually online), skill practice in a pool or pool-like water, and four open water dives with an instructor. Once certified, you can dive with a buddy, without a professional, to 18 meters (60 feet).

This guide covers each requirement, what the course actually teaches, how long it takes, the Junior rules for kids, and what it costs, using published prices from named dive shops. I checked every PADI page and price linked below on October 6, 2026. I trained with SSI rather than PADI, so the standards here come straight from PADI's own pages, not from memory. Standards and prices change, so confirm with your shop before you book.

PADI Open Water at a glance

Item	Details
Minimum age	10 (ages 10 to 14 earn Junior Open Water Diver)
Water skills	200 m/yd swim without stopping, or 300 m/yd with mask, fins and snorkel, plus a 10-minute float or tread. No time limit, any stroke
Medical	Diver medical questionnaire; a physician signs off if any answer flags a condition
Course parts	Knowledge development, confined water (pool) skills, four open water dives
Time	eLearning 5 to 10 hours; full course in as little as 2 to 4 days
Depth limit after certification	18 m / 60 ft (PADI's course page says to expect shallow dives, around 12 m / 40 ft)
Who you can dive with	A buddy, without professional supervision
Does it expire?	No, it's for life
Cost	Set by each dive shop. PADI eLearning alone was listed at $251 in PADI's US store on October 6, 2026

Sources: PADI Open Water Diver course page, PADI scuba certification FAQ and PADI diving restrictions.

PADI Open Water requirements

You need three things to start: be 10 or older, be medically fit to dive, and be comfortable in the water. No previous diving experience is required (PADI course page).

Minimum age

The minimum age is 10 in most areas. Students who certify between 10 and 14 earn the Junior Open Water Diver certification, which automatically becomes a full Open Water Diver certification at 15. Children under 13 need a parent or guardian's permission to register for PADI eLearning (PADI FAQ).

Younger kids can still get wet: children 8 and older can try scuba in a pool through PADI's Bubblemaker experience, and PADI also runs Seal Team, a multi-day pool program. Neither is a certification (PADI course page).

The swim and float test

Before you finish the course, your instructor will ask you to:

• Swim 200 meters or yards without stopping, or 300 meters or yards using mask, fins and snorkel. There is no time limit and you can use any stroke.
• Float or tread water for 10 minutes, using any method you like.

That is the whole test (PADI FAQ). You do not need to be a fast swimmer, just a calm one.

The medical questionnaire

Every student fills out a diver medical questionnaire. If none of the conditions on it apply, you sign it and you're done. If any do, a doctor has to assess you and sign a form confirming you're fit to dive before any in-water training. In some areas, local law requires every student to see a physician first (PADI FAQ).

PADI says a history of ear trouble, asthma, diabetes, allergies or smoking does not automatically rule you out, but only a doctor can assess your risk. It also notes that instructors and dive shop staff are not physicians, so ask your doctor, not your instructor (PADI FAQ; PADI course page). PADI recommends downloading and reviewing the form before you enroll. Finding out the night before your course that you need a doctor's note can cost you the course.

Physical challenges are not a barrier on their own. PADI says people with paraplegia, amputations and other challenges commonly earn the certification using adaptive techniques (PADI FAQ).

Materials and basic gear

Each student needs their own set of learning materials (eLearning or the PADI manual), plus a logbook and a dive-planning device such as a dive computer or dive planner table. PADI recommends owning at least your own mask, snorkel and fins, because fit matters. Many course packages include the rest of the scuba gear (all four shops priced below do), but check what yours covers (PADI FAQ).

What you learn in PADI Open Water

The course has three parts: theory, pool skills, and real dives. You have to show you can do each skill, not just sit through the hours.

1. Knowledge development (eLearning or classroom)

This is the theory: what to consider when planning a dive, how to choose gear, hand signals, and standard dive procedures. Many students do it through PADI eLearning, which PADI estimates at 5 to 10 hours of reading, videos and quizzes, ending with a final exam (PADI course page; PADI FAQ). Scuba-Fun Dive Center in Key Largo describes it as five academic sections plus the final exam (Scuba-Fun).

The eLearning fee covers the theory only: the digital course materials, a digital copy of the PADI Open Water Diver Manual and your eRecord of completion. In-water training and gear rental are paid to the dive center separately unless the shop bundles everything (PADI course page).

2. Confined water skills (the pool)

Here you take your first breaths underwater in a pool or calm, pool-like water such as a sheltered beach. Skills build on each other, and PADI includes short practice "mini dives" so you use them in context (PADI referral guide). Core skills include (PADI FAQ):

• Setting up and checking your scuba gear
• Clearing water out of your mask
• Entering and exiting the water
• Buoyancy control
• Basic underwater navigation
• Safety procedures, including what to do if you run low on air (your buddy carries an extra regulator you can breathe from while you ascend together)

3. Four open water dives

After the pool, you make four dives with your instructor in open water, usually over two days. That can be the ocean, a lake or even a flooded quarry (PADI FAQ; PADI referral guide). You repeat the pool skills in real conditions and, finally, get to look around.

Two published schedules show how shops fit it together:

Shop	Day 1	Day 2	Day 3
BlueWater Divers, Key Largo	Briefing, pool skills, open water dives 1 and 2	Dives 3 and 4, final skills	(2-day course)
Buddha View Dive Centre, Koh Tao	Pool training	Dives 1 and 2 from the beach	Dives 3 and 4 from the boat

Both shops expect the eLearning to be done before you arrive.

How long it takes

PADI says the eLearning takes 5 to 10 hours, and the full certification, including the pool and four open water dives, can be done in as little as 2 to 4 days depending on your schedule and the dive center (PADI course page). The course is performance based: you move on when you can do the skills, faster or slower than average (PADI FAQ). PADI also says you can spread it over as long as a year.

The single biggest time-saver is finishing the eLearning at home. Every hour of theory you do on your couch is an hour you are not spending in a classroom on your trip.

Depth limits and what you can do once certified

As a PADI Open Water Diver you can dive anywhere in the world to 18 meters (60 feet) with a buddy, without a professional. You can also rent gear, get tanks filled and book boat dives with operators and resorts (PADI course page).

Junior divers, the shorter Scuba Diver course and try dives carry tighter limits (PADI diving restrictions):

Certification	Max depth	Who you must dive with
Open Water Diver (15+)	18 m / 60 ft	A buddy
Junior Open Water Diver, ages 12 to 14	18 m / 60 ft	A certified adult
Junior Open Water Diver, ages 10 to 11	12 m / 40 ft	A PADI Professional or certified parent or guardian
PADI Scuba Diver (a subset of Open Water)	12 m / 40 ft	Under direct supervision of a PADI Professional
Discover Scuba Diving (try dive, not a certification)	12 m / 40 ft	Only during the experience; it does not let you dive afterward

PADI's recreational limit, with more training and experience, is 40 meters (130 feet), but PADI points out that some of the most popular diving is shallower than 12 meters, where the water is warmer and colors are brighter (PADI FAQ). Advanced Open Water is the usual next course if you want to go deeper; it gets its own guide.

How much PADI Open Water costs

PADI does not set one price. PADI dive centers are independently owned and set their own rates by location, class size and what they include (PADI FAQ). The one price PADI lists itself is the eLearning: $251 in PADI's US store when I checked on October 6, 2026 (PADI store). PADI notes the eLearning price varies by region. All four shops below fold it into a single course price.

Here are four published full-course prices, checked October 6, 2026:

Dive shop	Location	Published price	What the shop says is included
Scuba-Fun Dive Center	Key Largo, Florida	$679 plus tax	eLearning, pool sessions, four reef dives, all gear; max 4 students per instructor
BlueWater Divers	Key Largo, Florida	$695	eLearning, rental gear, four open water dives
Paradise Divers	Utila, Honduras	$298	eLearning, 4 nights of accommodation, two confined water sessions, four open water dives and two fun dives
Buddha View Dive Centre	Koh Tao, Thailand	10,900 THB	eLearning, all equipment, pool training and four ocean dives; max 4 students per instructor

These are examples, not averages. Prices change and promotions come and go; Scuba-Fun, for one, says its prices were correct as of June 2026 (Scuba-Fun).

To compare quotes fairly, PADI suggests asking (PADI FAQ):

• Are the course materials (eLearning) included?
• What personal gear do I need to bring or buy?
• Is rental gear included?
• Are there extra fees, such as boat or certification fees?
• How many students per instructor?
• Where will the open water dives take place?

If you already bought eLearning directly from PADI, tell the shop. Scuba-Fun, for example, says it adjusts the course fee when your eLearning is properly linked to it (Scuba-Fun).

Open water referral: start at home, finish on your trip

If your vacation days are precious, you can split the course. With a PADI Open Water referral, you do the eLearning and pool sessions with a local shop, and your instructor gives you a referral form. You then have 12 months from your last training session to finish the four open water dives at any PADI dive center in the world. PADI says that final portion typically takes a day and a half (PADI referral guide).

PADI's course page lays out the in-water choices after eLearning: pool and open water dives close to home, both on vacation, or the pool at home and the open water dives on your trip (PADI course page). As a price example, Scuba-Fun in Key Largo lists referral ocean dives at $400 plus tax, with a $105 pool review recommended if your pool sessions were a while ago (Scuba-Fun).

The tradeoff: don't let months slip by between the pool and the ocean. PADI itself suggests doing the local part close to your trip so the skills are fresh.

PADI, SSI and other agencies

PADI is one of several agencies that teach entry-level scuba. SSI, which I trained with, has its own Open Water Diver course, and other agencies run entry-level courses too. Moving between them is not automatic: PADI says there is no simple "equivalency," but an entry-level certification from another agency can often qualify you for the next PADI course, such as Advanced Open Water (PADI FAQ). A full PADI vs SSI comparison is on the publishing list.

In practice, the instructor and the shop matter more to your first dives than the logo on the card. Look for small groups, recent reviews and clear answers to the cost questions above.

Tips before you book

• Finish the eLearning before you travel. PADI recommends it, and so does every shop schedule above.
• Read the medical form early. If you'd answer yes to anything, see your doctor before the trip, not after.
• Buy a mask that fits. PADI suggests owning at least your own mask, snorkel and fins because they have a personal fit. Try masks on in a shop if you can.
• Practice the swim. 200 meters without stopping is easy for some people and not for others. Find out in a pool at home.
• Don't panic about your ears. PADI notes that if you can equalize on a plane, you'll probably be fine learning to equalize underwater (PADI FAQ).
• Pick the place for your open water dives on purpose. Warm, calm, clear water makes the four training dives much easier.

Where to do your open water dives

If you're choosing a place to certify, start with calm, shallow, warm sites:

• Florida Keys: Key Largo shops run the four training dives on the reef. See the best dive shops in Key Largo, which includes both Key Largo shops priced above.
• Egypt's Red Sea: Sheltered house reefs around Sharm El Sheikh and Hurghada are where most local Open Water courses happen. See the Red Sea diving guide.
• A winter trip: Several of the best places to scuba dive in December suit brand-new divers, including Bonaire, Cozumel and Grand Cayman.

For more destinations and shop lists, browse the ScubaDock dive destinations hub.

Whatever you pick, book with a shop that answers your questions plainly, keeps groups small, and shows its prices up front. Get those right and your four training dives turn into the first of many.

Requirements and prices checked October 6, 2026 against the PADI and dive shop pages linked above. This post is reviewed every year. Spot something that changed? Let me know through the contact page.