Your First Open Water Dive: What to Expect, How to Prepare, and Why You'll Love It

Liz Robinson   Jun 06, 2026

Open Water Certification Beginner Divers Checkout Dives Learn to Dive Scuba Certification Queen Creek

Your First Open Water Dive: What to Expect, How to Prepare, and Why You'll Love It

Nervous about your first open water dive? Here's exactly what to expect, from gearing up on the surface to that first breath underwater and how to make the most of it.

 

There's a moment, maybe five minutes into your first open water dive, when it happens. The gear stops feeling heavy. The instructions stop playing in a loop in your head. Your breathing slows. And you realize: you're underwater, breathing, and it feels completely natural. That moment is why people become divers.

If you're reading this, you're either about to experience that moment for the first time, or you're working up to it. Either way, you're in the right place. This guide walks you through exactly what happens on your first open water dive, what to expect, what it feels like, how to prepare, and how to handle the nerves that most beginners (honestly, most divers at any level) feel before they hit the water. By the time you reach the end, you'll have a clear picture of what's ahead, and a lot more excitement than anxiety.

 

What Is an Open Water Checkout Dive?

An open water checkout dive is the final phase of your scuba certification. After completing your knowledge development (online study or classroom) and your confined-water sessions in a pool, the checkout dives take you to a real open-water environment, a lake, quarry, or ocean, to demonstrate the skills you've learned under real diving conditions. Here in Arizona, we take you to Lake Pleasant for your checkout dives.

Most Open Water certification programs, including SDI, require four checkout dives completed with a certified instructor. Each dive builds on the last, and each includes a handful of skill demonstrations alongside actual exploration time. The checkout dives aren't a test you can fail in any punishing sense, they're a supervised confirmation that you've absorbed what you learned in the pool, in the environment where you'll be diving for the rest of your life.

An Open Water certification is your passport to exploring a world that covers more than 70% of our planet, coral reefs, dramatic walls, and shipwrecks. The checkout dives are your first stamp in that passport.

After your four checkout dives are complete and signed off, you receive your certification card, your C-card, which is recognized by dive shops and operators worldwide.

 

How to Prepare Before You Get in the Water

The most important preparation for your first open water dive isn't physical, it's mental. You've already done the hard work in the pool. You know the skills. What you're preparing for now is the transition from a controlled, shallow, familiar environment to an open, natural one. Here's how to set yourself up well.

The Night Before: Gear, Rest, and Mindset

• Lay out your gear the night before. Know where everything is. The morning of a dive is not the time to search for your mask or realize you forgot your fins.
• Get a full night's sleep. Fatigue increases anxiety and reduces the enjoyment of the dive. Eight hours is not optional.
• Stay hydrated. Dehydration is a real factor in how your body processes nitrogen. Drink water, not alcohol, the evening before a dive.
• Don't dive with a cold or congested sinuses. If your Eustachian tubes are blocked, you won't be able to equalize, and forcing equalization while congested can cause real injury. Wait until you're clear.
• Visualize the dive. Spend five minutes running through each skill in your mind, mask clearing, regulator recovery, your controlled descent. Mental rehearsal is a legitimate technique that works.

The Morning of Your Dive

• Eat a light, easy meal. You want fuel without a full stomach, nausea is less likely on a light meal. Avoid heavy, greasy food before diving.
• Arrive early. Rushing to a dive site is one of the fastest ways to spike your anxiety. Give yourself extra time to set up gear calmly, ask any last questions, and get comfortable in the environment.
• Ask Questions. Talk to your Instructors and Divemasters, it's ok to be nervous and it's ok to have questions. Please speak up, we're there to help you succeed!
• Do your buddy check. Check your buddy's gear including Air, Octo, BCD, Weights, Releases, computer, Mask/fins/snorke... Run through gear with your buddy before every dive. Not just because your instructor will ask, but because it's the habit that keeps divers safe their whole careers.

 

What the First Dive Actually Feels Like: Minute by Minute

No guide can fully prepare you for the sensation of your first open water dive, but knowing roughly what to expect takes the edge off. Here's an honest walkthrough of what most first-time divers experience.

Gearing Up on the Surface

You've done it in the pool, scuba gear is heavy and a little awkward when on land. Your BCD and tank feel substantial and now it's time to carry into the lake. Most new divers feel a bit ungainly as they waddle toward the water's edge, and that's completely normal. The moment you submerge, the weight disappears. Everything that felt cumbersome on land becomes part of you underwater.

That First Breaths in Open Water

Getting into the water is its own adjustment. You'll wade in from the shore until you're in about wasit deep water or a bit higher, get your fins on, and run through a quick final check with your instructor and dive buddies on hand signals and gear before you go. The first dive will be shallow and relaxed, allowing students to get comfortable in their new setting. 

When your instructor gives the signal, you put your face in and start your descent. Lake Pleasant isn't the Caribbean. The water is cooler, visibility is limited, and it's darker than most people picture. Dont worry, your instructor will be right there with you and this is great training for future amazing dive sites.

What catches most new divers off guard is how fast the lake stops feeling unfamiliar. You've already done this in the pool,and the skills are the same out here. The setting is just bigger, and within a minute or two underwater, the focus naturally moves away from the environment and toward what's in it. Look for the Catfish!

Your instructor and your dive buddy are with you the whole way down, and if anything feels off, you signal and you stop. Ears won't equalize, a moment of anxiety, whatever it is, there's no judgment and no timeline. The first open water dive is built to be manageable, and for most people, it's easier than they expected.

Descent and the Underwater World

The descent will be slower than what you expect and that's by design. Every couple of feet, pause and equalize your ears, pinch your nose and gently blow until you feel them clear, and your instructor will be right there checking on everyone as you go. There's no target pace and no pressure to get to the bottom fast.

Visibility at Lake Pleasant varies by season, but once you settle in and your eyes adjust, there's more to see than what you may have imagined. The lake is big and that openness hits you in a way the pool never could. It's time to get excited, you're actually out in open water diving!

Keep an eye out for catfish. They're curious and they're common at depth, and spotting one on your first open water dive is a great memory!

At some point during the dive your instructor will ask you to perform a few skills, the same ones you've been practicing, just in open water now. You'll run through them, check off the requirements, and then it's back up to the surface.

And when you get there, most people have the same reaction: that was it? Not because it wasn't enough, but because it went better than they thought it would. You came up one dive closer to your SDI Open Water Scuba Diver certification, and the hardest part, the anticipation, is already behind you.

The Skills You'll Practice on Your Checkout Dives

Your checkout dives include skill demonstrations that your instructor will sign off as you complete them. Knowing what's coming removes a huge amount of the performance anxiety that many new divers feel. Here's what to expect:

• Mask clearing. Flooding your mask with water and clearing it by exhaling through your nose. You practiced this in the pool, it's the same skill, just in a natural environment.
• Regulator recovery. Removing your regulator from your mouth and retrieving it, either by feel or by sweeping your arm. Pool skills, open water setting.
• Buoyancy control. Hovering neutrally, controlling your depth with your breathing, inhale to rise slightly, exhale to sink slightly. This is the skill that transforms a competent diver into a graceful one, and it takes practice beyond the certification course.
• Navigation and dive planning. Basic compass use and awareness of your position relative to your entry point.

 

A note from our instructors: If you don't nail a skill perfectly on the first try, your instructor will have you practice it again. This is not a failure, this is exactly what the checkout dive is for, to train and build your skills in open water. Every experienced diver had a first open water dive where something felt awkward. Patience with yourself is the most useful skill you can bring underwater.

 

Common Worries And the Honest Answers

Here are the concerns we hear most often from students before their first open water dive and what we tell them.

"What if I panic underwater?"

Anxiety is normal. Panic is what makes divers unsafe and it is much rarer than people fear. The most effective tool against panic is slow, deliberate breathing. When you feel your pulse rise, take one long, slow breath in and exhale completely. Your nervous system responds to breath rate almost instantly. Your instructor is with you throughout and will surface with you immediately if you signal that you want to come up, there will be no questions aske and no judgment.

 

"What if I can't equalize?"

Ear equalization, pinching your nose and gently blowing, is one of the most important skills you'll use on every dive. Descend slowly and equalize early and often, before you feel pressure. If you feel discomfort, stop and ascend a couple of feet or two until it resolves. Never force equalization. If you had trouble in the pool, tell your instructor before the dive so they can work with you at an even slower pace.

 

"What if I run out of air?"

Your pressure gauge shows your air supply throughout the dive and your instructor monitors tank levels for the group. You'll surface with plenty of air remaining, Open Water dives are planned conservatively, especially for new divers. The concept of "running out of air" as a surprise is one of diving's biggest misconceptions; divers surface intentionally, long before the tank is empty.

 

"What if I can't see anything?"

Visibility varies by dive site and season, and your first checkout dives here in Arizona are on a crystal-clear tropical reef, although we wish they were! That's okay though, the experience of being underwater with the weightlessness, the breathing, and the movement, is extraordinary regardless of visibility. The marine life gets better as your diving takes you to new places. The first dive is about the experience of being there.

 

"What if I don't like it?"

Some people complete their Open Water certification and decide diving isn't for them. That's genuinely fine. Most people, though, find that the nervousness of the first dive transforms into curiosity, then enthusiasm, then a hobby they return to for life. Nearly every diver remembers their first open water dive vividly and not because it was terrifying, but because it was unlike anything else they'd ever done.

 

Tips to Get the Most Out of Your First Dive

• Slow everything down. Diving is not a sport that rewards speed. Move slowly, breathe slowly, look slowly. The calmer you are, the more you'll see and the longer your air will last.
• Look up. New divers often stare straight down or straight ahead. The surface has light filtering through the water above you, it's one of diving's most beautiful sights.
• Don't try to memorize everything. You will not absorb every detail of your first dive. That's completely normal, your brain is processing an enormous amount of new sensory information. Trust that it gets easier and richer with every dive.
• Tell your instructor how you're feeling. Before, during (with hand signals), and after. Instructors are there to support you, not to judge your comfort level.
• Start your dive log immediately. Write down your first dive while the details are fresh like site, depth, bottom time, what you saw, how it felt. You'll want that memory in ten years.
• Let yourself feel excited. New divers sometimes suppress excitement in an effort to stay calm. You don't have to. Excitement and calm can coexist underwater. Let yourself be amazed.

 

What Happens After Your Open Water Certification?

Your Open Water certification authorizes you to dive with a buddy to a maximum depth of 18 meters (60 feet) at sites around the world. It's the beginning of a very exciting adventure.

Most new divers find that the certification course ends with a strong desire to keep going. The SDI Advanced Adventure course builds directly on your Open Water skills, introducing deep diving, navigation, night diving, and other specialty areas. Many divers complete both courses within the same year. Beyond that, specialty certifications in areas like wreck diving, underwater photography, or rescue diving open up entirely different dimensions of the sport.

What almost every diver agrees on is this: looking back at your first open water dive from twenty dives in, it seems both recent and a lifetime ago. The nerves you felt were real. So was the moment they disappeared.

 

FAQ: Your First Open Water Dive

What should I expect on my first open water scuba dive?

Your first open water dive follows your pool training and includes skill demonstrations in a natural environment, for us in Arizona this means Lake Pleasant. You'll practice mask clearing, regulator recovery, buoyancy control, and ascent techniques with your instructor present throughout. Most new divers feel nervous before entering the water and significantly calmer within the first few minutes underwater. The experience of breathing underwater for the first time and the weightlessness of neutral buoyancy is something most divers describe as unlike anything else they've experienced.

 

How deep do you go on an Open Water checkout dive?

Open Water checkout dives are typically conducted at depths between 5 and 18 meters (15–60 feet). The first dives are usually shallower to build comfort and confidence; later dives in the sequence may go deeper as your instructor confirms your skills. The maximum recreational depth limit for an Open Water certified diver is 18 meters (60 feet).

 

Is it normal to be nervous before your first scuba dive?

Completely normal. Most divers, including experienced ones, feel a degree of nerves before dives, especially firsts. Anxiety typically decreases significantly within the first few minutes underwater, once breathing through the regulator becomes familiar and the sensory experience of being underwater takes over. Slow, deliberate breathing is the most effective tool for managing nerves both above and below the surface.

 

What does it feel like to breathe underwater for the first time?

The first breath through a scuba regulator underwater feels strange and then quickly natural. Your brain initially registers the unusual sensation of inhaling while your face is submerged. The air sounds louder than expected as your own breathing becomes your primary soundtrack. Within a few breaths, your nervous system accepts the new reality. Most divers describe the experience as unexpectedly calm, the rhythmic sound of breathing and the surrounding quiet of the underwater world create a meditative quality that's difficult to anticipate and impossible to forget.

 

How many open water dives do you need to get certified?

Most Open Water certification programs, including SDI, require four open water checkout dives completed with a certified instructor. These dives are typically done over one or two days and follow the completion of academic study and confined-water pool sessions. Upon successful completion of all four dives, you receive your certification card.

 

What if I can't equalize my ears on my first dive?

Difficulty equalizing is one of the most common challenges new divers face, and it's entirely manageable. The solution is to descend very slowly and equalize early and often before you feel pressure, not after. If discomfort develops, stop descending and ascend a few feet until it resolves. Never force equalization through pain. If you have consistent trouble, tell your instructor before the dive so they can adapt the descent pace for you. Never dive if you have a cold or congested sinuses, as blocked Eustachian tubes can make equalization impossible and potentially dangerous.

 

What should I bring to my first open water checkout dive?

Your certification course will specify required items, but generally: personal equipment (mask, fins, boots, wetsuit if you own one), a towel and dry change of clothes, water and a light snack, sunscreen, and a dive log or app to record your first dives. Rental equipment including BCD, regulator, tank, and wetsuit if needed, is provided through Dive Arizona.

 

Ready to Take Your First Open Water Dive?

We teach Open Water certification right here in Queen Creek, with small class sizes and instructors who genuinely love helping first-timers find their confidence underwater. Check our upcoming class schedule or reach out — we'll walk you through everything before you ever get near the water.

See our upcoming courses here. Have any questions? You can always reach out and we'd be happy to answer any questions for you!