Your first afternoon of snorkeling
Snorkeling clicks faster than almost any outdoor activity. Here's what actually happens in the water — the handful of things worth knowing before you go, and what to stop worrying about.
By The JustBeginning Editors · Published May 23, 2026
Most people overthink snorkeling before they try it. The list of things you actually need to know before your first session fits in about three paragraphs. The rest is just getting your face wet.
Here’s what actually happens — and what to do when the usual beginner moments arrive.
Before you get in the water
The single most valuable thing you can do before your first open-water snorkel is practice in a pool. Ten minutes in a pool removes 90% of first-timer anxiety.
Put your face in the water and breathe. Just breathe through the snorkel tube. The first few inhales feel wrong — slightly resistant, a little mechanical — and then your brain adjusts and it stops feeling strange. The whole adaptation takes less than two minutes.
Clearing the snorkel: if water gets in (and it will, at least once), you clear it with a single sharp exhale. Hard out, not slow. The purge valve at the bottom of a dry snorkel does most of the work; you just push air through it. Practice this in the pool. It becomes completely automatic by the third time.
Defogging your mask: new masks have a factory coating on the lens that causes fogging. Before your first session, scrub the inside of the glass with a pea-sized amount of toothpaste, scrub with your finger for a minute, rinse thoroughly. Before every subsequent session, spit on the lens, rub it around, and rinse lightly. It sounds primitive. It works.
The mask seal: before you put your mask on properly, do the test. Press it against your face without the strap, inhale lightly through your nose, let go. It should stay. If it falls, the seal isn’t right for your face shape. A leaking mask is the number-one reason people have a bad first time.
In the water: the first five minutes
Everybody has a brief adjustment period. Here’s what it looks like so you can stop worrying when it happens to you.
The breathing thing: you will briefly feel like you can’t breathe. You can. Your brain is experiencing cognitive dissonance — face underwater, mouth breathing through a tube — and it takes about 60 seconds to convince it this is normal. Float, breathe slowly, don’t fight it. It resolves on its own.
Fin position: your legs should be nearly straight, flutter-kicking from the hip with minimal knee bend. The kick that feels natural (cycling motion, lots of knee) is wrong — you’ll churn water, create drag, and exhaust your calves in 10 minutes. Flutter kick from the hip. Keep your fins underwater; if they’re breaking the surface, your kick is too high.
Where to look: down and slightly ahead. You’re looking at the reef, not at the horizon. Let your body float horizontal — your hips and fins should be near the surface. If your legs are sinking, try taking a slightly deeper breath (more buoyancy) or kicking a tiny bit more.
Breathing rhythm: slow and steady beats fast and anxious every time. Take full breaths. Exhale completely. Some beginners hyperventilate from anxiety and feel dizzy — if that happens, stop, float on your back for 30 seconds, breathe normally, and get back in.
What you’ll see (and what to do about it)
The first time you put your face in clear tropical water and see a reef, most people have a brief moment of “oh, that’s what this is about.” It hits quickly and hard.
Some practical things:
Don’t touch anything. Coral is alive, and your hands will damage it. More importantly, coral can cut you badly enough to need stitches — the edges are razor-sharp and the wound takes forever to heal in saltwater. Keep your hands by your sides. Keep your fins up and away from the reef floor. A single tail swipe with a fin can damage years of coral growth.
Following fish: most reef fish are not scared of snorkelers. You can get surprisingly close by approaching slowly and horizontally — if you’re diving toward them they flee; if you float toward them gently they often hold. The big dramatic-looking fish (parrotfish, pufferfish, moray eels looking out from holes) are usually unconcerned with you.
Going under: if you want to dive below the surface, you need to equalize the pressure in your mask by pinching your nose through the mask skirt and exhaling gently (same technique as flying or going deep in a pool). This is only possible with a traditional mask — not a full-face mask. Dive down, look around, come back up, exhale sharply to clear your snorkel, and you’re back to normal.
When things go slightly wrong
Mask floods: a small amount of water in the mask is normal and not a crisis. To clear it, press the top of the mask frame against your forehead with your hand, tilt your face up toward the surface, and exhale sharply through your nose. The air forces the water out the bottom seal. Repeat once if needed. Practice this in the pool beforehand.
Swallowing saltwater: it happens. It tastes terrible. It is not dangerous in a small amount. If you inhale through the snorkel when there’s water in it, you’ll cough — take your head out of the water, cough it out, breathe normally, and go back in. The reflex is unpleasant but over in 30 seconds.
Exhaustion: snorkeling feels effortless until suddenly it doesn’t. If you’re in open water when this happens, roll onto your back. You float easily on your back — rest there for a minute, then either continue or head in.
Feeling the current: a light current is normal and manageable. If you notice you’re drifting, turn and face it and swim at a slight angle across it rather than directly against it. If the current is strong enough that you’re not making progress, don’t fight it — signal for your boat or swim parallel to shore. Strong currents at snorkel sites are unusual; guided tours pick spots with favorable conditions.
After the first session
Two things happen reliably after a first successful snorkel:
- You want to go again immediately.
- You can feel exactly the spots you’ll be sunburned tomorrow.
The sunburn is the only real beginner mistake that has lasting consequences. Your back, the backs of your thighs, and the nape of your neck are all angled toward the sun for an hour while you are completely distracted by what’s below you. Wear a rash guard. Bring it next time if you didn’t bring it this time.
If you want to take it further — free-diving, identifying what you saw, finding better spots — the skills build quickly from here. A second session is dramatically more relaxed than the first. A fifth session starts to feel fluent.
Ready to get the right gear? Our snorkeling gear guide covers the four things worth buying and the half-dozen you can safely skip.