If you have spent years swimming laps, you already own the two things that take the longest to build: aerobic fitness and an efficient stroke. That puts you well ahead of most beginners when you step into open water. What the pool never taught you, though, are the specific skills open water demands, and the first time many strong pool swimmers swim in a lake, they are surprised by how disorienting it feels. The good news is that you can build every one of those skills, and you can start most of them in the pool you already swim in. Here is how to make the transition smoothly and safely.

What's Different About Open Water

Understanding the gap helps you train it. In a pool you have a black line to follow, walls to turn and rest on, lane lines that calm the water, a consistent temperature, and a clear view of the bottom. Open water strips all of that away. You navigate by lifting your head to sight off buoys and landmarks. There are no walls, so you swim continuously and never get the micro-rest of a turn. The water moves with chop, current, and wind, and it can be cold, murky, and disorienting. None of this is harder than pool swimming once you are used to it, but it is different, and the swimmers who struggle are usually the ones who assumed their pool fitness alone would carry them through.

Master Sighting

Sighting is the single most important open water skill, and it is the one you most need to drill before you need it. Sighting is the act of lifting your eyes just above the surface to spot a buoy or landmark, then settling back into your stroke, all without stopping or losing rhythm. Done poorly, with the whole head lifting high out of the water, it kills your speed by dropping your hips and forcing your legs down. Done well, it costs almost nothing.

Practice it in the pool. As your hand enters and you begin the catch, lift just your eyes above the waterline, looking forward, take a quick glance, then turn your head to the side to breathe as your face drops back down. The forward sight and the side breath happen as one smooth, combined motion. Aim to keep your hips high throughout. Drill it on a few strokes of every length until it feels automatic, then carry it into open water, where you will typically sight every six to ten strokes, more often in chop or near turns.

Adapt Your Breathing

In calm pool water you may breathe comfortably to one side every time. Open water punishes that habit. Chop, boat wake, and wind can come from either direction, and a one-sided breather who can only turn to the side facing the waves will inhale water repeatedly. Bilateral breathing, breathing comfortably to both sides, lets you choose the calmer side and keeps your stroke balanced and straight, which matters when there is no lane line to keep you honest. If you are a committed one-sided breather, make bilateral breathing a deliberate project now: practice breathing every third stroke in the pool until both sides feel natural. Your open water self will thank you.

Learn to Swim Without Walls

Pool swimmers get a hidden rest every length: the glide off the wall, the streamline, the moment of recovery. Open water gives you none of it. To prepare, build sets where you swim continuously without pushing off the wall, turning open-turn style and rolling straight back into your stroke, or swimming long, unbroken distances. This trains the steady, sustainable rhythm open water rewards and reveals whether your pacing holds up without the regular reset a wall provides. Continuous swimming also builds the mental endurance of settling into a long, monotonous effort, which is a real part of open water.

Train Pacing by Feel

There is no pace clock in a lake. Pool swimmers often pace by reading the clock every length, and without it they either go out too hard and fade or hold back too much. Train your internal sense of effort by doing pool sets where you swim at a target effort without looking at the clock, then check your time afterward to calibrate. Learn what "comfortably hard" and "steady all-day pace" actually feel like in your body. In open water, that internal pacing is all you have, and getting it right is the difference between a strong, even swim and a panicky one.

Pool Drills That Prepare You for Open Water

You can build most open water skills before you ever leave the pool. Add these to your regular sessions:

1. Sighting drill: lift your eyes to sight forward on a set number of strokes per length, keeping hips high and the motion smooth, until it is automatic.

2. Bilateral breathing sets: swim freestyle breathing every third stroke for entire sets to make both sides comfortable.

3. No-wall continuous swims: swim long distances or use open turns without a push-off to mimic the relentless rhythm of open water.

4. Pace-by-feel sets: swim repeats at a target effort without watching the clock, then check your splits to calibrate your internal pacing.

5. Drafting practice: if you train with others, swim close behind or beside a partner to get comfortable with contact and the pull of someone's wake, both common in open water and triathlon starts.

Getting Into Open Water Safely

When you are ready to swim in actual open water, ease in. Choose a safe, supervised location, ideally a managed open water venue or an organized group session, and never swim alone your first times out. Start in shallow, calm water close to shore and get used to the temperature, the murkiness, and the feel of swimming without a bottom in view. Cold water can trigger an involuntary gasp reflex, so enter gradually and let your breathing settle before you put your face down. Build up distance slowly, stay parallel to shore where you can stand if needed, and always swim with a brightly colored cap and, ideally, a tow float so you are visible and have something to rest against. Your fitness will be there; let your nervous system catch up to the new environment at its own pace.

Be Patient With the Mental Side

Many accomplished pool swimmers are caught off guard by how different open water feels mentally. The dark water, the lack of a visible bottom, the sensation of vastness, and the loss of the pool's comforting structure can trigger anxiety even in fit, capable swimmers. This is completely normal and it fades with exposure. Each calm, successful swim rewrites your nervous system's expectations. Go slowly, celebrate small wins, and remember that composure in open water is a trained skill, not a fixed trait. The fitness you bring from the pool is a huge head start; give the mental adaptation the same patient practice you would give any new skill.

A Sensible Progression Into Open Water

Rather than jumping straight from the pool to a long open water swim, build up in deliberate stages. Begin with the pool drills described above, woven into your normal training for a few weeks until sighting, bilateral breathing, and continuous swimming feel natural. For your first open water sessions, choose a safe, supervised venue and stay in shallow water close to shore, swimming short distances parallel to the bank where you can stand if needed, simply to get used to the temperature, the murkiness, and the absence of a visible bottom. As your comfort grows, gradually extend your distance and time in the water, always with a buddy or at a managed venue, and start practicing sighting off real buoys and landmarks rather than the pool wall. Treat the first few weeks as acclimatization for your nervous system as much as training for your body. Your pool fitness gives you a large head start, so resist the urge to rush; a patient progression builds the calm, automatic competence that makes open water genuinely enjoyable rather than nerve-wracking.

Frequently Asked Questions

Is open water swimming harder than pool swimming?

It is not necessarily harder, but it is different. Open water demands skills the pool never teaches, such as sighting to navigate, breathing in chop, swimming continuously without walls, and pacing without a clock. Your pool fitness and stroke transfer directly, so the challenge is mostly in the new navigation and composure skills, all of which you can train. Many pool swimmers feel disoriented at first, then adapt quickly with practice.

How do you practice open water swimming in a pool?

Add open-water-specific drills to your pool sessions: practice sighting by lifting your eyes forward on set strokes, build bilateral breathing so both sides feel natural, swim continuously without pushing off walls to mimic the no-wall rhythm, and do pace-by-feel sets where you swim at a target effort without watching the clock. If you train with others, practice drafting close behind a partner.

What is sighting in open water swimming?

Sighting is lifting your eyes just above the surface to spot a buoy or landmark, then settling back into your stroke without stopping. It is how you navigate when there is no black line to follow. Done well, you lift only your eyes as a smooth part of your stroke and combine it with your normal side breath, so it costs almost no speed. Most swimmers sight every six to ten strokes, more often in chop.

How often should I sight in open water?

As a starting point, sight every six to ten strokes, then adjust to conditions. Sight more often in choppy water, near turns, or when buoys are hard to see, and less often on calm, straight stretches with a clear landmark. The goal is to stay on course without over-sighting, since each sight costs a little energy. With practice you will develop a feel for the minimum sighting that keeps you swimming straight.