How to Increase Your Open Water Swimming Distance Safely

Updated

Increase open water distance by building gradually, swimming regularly enough to adapt, and fixing the small errors — leaking goggles, swimming off course — that waste energy and confidence. LoneSwimmer's guide to increasing open water distance is built around a simple progression: 1-1-5-8-10. The exact units depend on your starting point, but the principle is the same: start short, repeat that distance until it feels easy, then step up in modest increments rather than jumping straight to your goal. This approach suits swimmers who can already swim continuously in a pool or calm open water and want to extend distance without burning out or losing form.

The progression principle

The core idea is that each new distance should be a small, repeatable step above what you have already comfortably completed — not a one-off heroic effort.

A practical way to apply a 1-1-5-8-10 style ladder:

Step What you do Why
1 Swim your current comfortable distance Establish a baseline you can repeat
1 Repeat the same distance Confirm it's genuinely easy, not a fluke
5 Add a moderate increment First real stretch
8 Add a larger increment Build on an established base
10 Reach your target distance The goal becomes a normal swim

The numbers are relative, not absolute. If your baseline is 500 m, the ladder scales from there; if it's 2 km, it scales from there. What matters is that each step is small enough that you finish with something left, and that you repeat a distance before increasing it.

Frequency and recovery

Distance gains come from consistent swimming, not from occasional long efforts.

  • Swim often enough to adapt. Regular sessions at a manageable distance build the aerobic base and stroke efficiency that longer swims demand. One long swim a week with nothing in between rarely produces steady progress.
  • Treat recovery as part of the plan. After a step up in distance, give yourself easier sessions or rest before the next increase. Fatigue accumulated across sessions is what turns a manageable step into a failed one.
  • Don't increase distance and intensity at the same time. If you're extending distance, keep the pace controlled. Save harder efforts for sessions where distance is stable.

Common mistakes that cost you distance

LoneSwimmer's account of early swims highlights the errors almost every new open water swimmer makes. They matter for distance because each one drains energy or adds unnecessary swimming.

Leaking goggles

Goggles that leak force you to stop, tread water, and readjust — breaking rhythm and costing time and energy. Fix the fit before you extend distance: test goggles in the pool, adjust the strap tension, and consider a different model or seal type if leaks persist. A swim you can't complete without stopping to clear your eyes is not a swim you can build on.

Swimming off course

Swimming off course adds distance you didn't plan for and can push you into unfamiliar water. In open water there are no lane lines, so you need a way to stay on line:

  • Sight frequently. Lift your eyes to a fixed landmark — a building, a buoy, a tree — every few strokes, then return to your stroke.
  • Pick a target that works from the water. Objects that look obvious from shore can vanish at eye level. Choose something tall or high-contrast.
  • Check your line after the swim. If you consistently drift one way, you may have a stroke asymmetry worth addressing.

When to consider organised swims or races

Organised swims and races are a useful forcing function for distance: they give you a date, a measured course, and safety cover. LoneSwimmer's own path started with early open water swims and quickly turned toward organised events.

Consider entering one when:

  • You can comfortably complete a distance close to the event's shortest option.
  • You have practised sighting and can hold a line without constant stops.
  • Your goggles and other kit are reliable over the full expected duration.
  • You understand the event's conditions — water temperature, currents, and whether wetsuits are permitted.

An event is not a substitute for preparation. It's a way to test preparation you've already done.

A simple way to start

  1. Pick a distance you can currently swim without stopping.
  2. Repeat it across several sessions until it feels routine.
  3. Add a small increment and repeat that until it too feels routine.
  4. Continue stepping up, keeping each increase modest.
  5. Fix kit and navigation problems as they appear, rather than pushing through them.
  6. Once a target distance feels normal, look for an organised swim at or near that distance.

The progression is unglamorous, but it's what turns a distance you can survive into a distance you can swim.