Triathlon & Swimming Wetsuits

Triathlon & Swimming Wetsuits NZ

Swimming in open water feels very different to swimming in a pool. Without a lane rope, a black line to follow or a wall to push off, your body position and efficiency in the water matters more than ever. A well-designed triathlon or open water wetsuit addresses this directly, adding buoyancy where you need it, freeing your shoulders for an unrestricted stroke, and keeping you warm enough to swim comfortably in NZ's coastal and freshwater conditions.

At Swim Safe, we stock triathlon and open water wetsuits from leading brands including Arena. Each suit in our range is built around the specific demands of open water swimming and triathlon, and is approved for use in FINA, World Triathlon, Ironman and USAT sanctioned events.

What Makes a Triathlon Wetsuit Different?

Triathlon and open water wetsuits are engineered differently to surf wetsuits or general-purpose wetsuits. Where a surf wetsuit prioritises warmth and durability above all else, a triathlon wetsuit is optimised for performance in the water. The priorities are buoyancy, flexibility and hydrodynamics.

Buoyancy is strategically distributed throughout the suit using panels of varying neoprene thickness. Denser neoprene in the core and legs lifts the lower body into a higher, more streamlined position in the water. This reduces drag and makes your stroke more efficient, particularly for swimmers whose legs tend to sink.

Flexibility in the shoulders and arms is essential for an unrestricted freestyle stroke. Triathlon wetsuits use thinner, more elastic neoprene in these areas specifically so your catch and pull are not compromised by the suit. A wetsuit that restricts shoulder movement will slow you down and tire your arms quickly.

Thermal protection keeps you swimming comfortably in cooler water. NZ water temperatures vary significantly by region and season, from around 12 degrees in southern waters to over 22 degrees in the north during summer. A wetsuit extends the range of conditions in which you can swim comfortably and safely.

Entry-Level and Performance Wetsuits

Our range covers two distinct levels: entry-level suits designed for beginner and recreational open water swimmers, and performance suits built for those racing at a higher level.

Entry-level wetsuits focus on the core essentials: buoyancy, flexibility, thermal protection and comfort, in a package that is accessible for those new to open water swimming or triathlon. They are a great starting point for anyone doing their first open water swim or triathlon event.

Performance wetsuits add more advanced construction features including carbon fibre technology, enhanced hydrodynamic panels and double-layer forearm construction for a more powerful catch phase. They suit experienced athletes who are optimising for race performance.

Sizing guides are available on each individual product page to help you find the right fit.

Why Fit Matters

A wetsuit that does not fit correctly will not perform as intended. Too loose and water will flood in, reducing the thermal and buoyancy benefits. Too tight and it will restrict your breathing and shoulder movement. Taking the time to find the right size before you buy is the most important step in the process. Each product page includes a detailed sizing guide. If you are between sizes or unsure, contact our team and we will help you work it out.

Frequently Asked Questions

What is the difference between a triathlon wetsuit and a regular wetsuit?

Triathlon and open water wetsuits are designed specifically for swimming performance. They use strategically varied neoprene thickness to add buoyancy where it is needed, thinner and more flexible neoprene around the shoulders to allow an unrestricted stroke, and a smooth outer skin to reduce drag through the water. Surf wetsuits prioritise warmth and durability but restrict shoulder movement and are not suitable for competitive swimming or triathlon. General-purpose wetsuits fall somewhere in between but are not optimised for either purpose.

How should a triathlon wetsuit fit?

A triathlon wetsuit should feel snug across the whole body with no excess material bunching at the shoulders, hips or knees. It will feel noticeably tighter when dry than when wet. This is normal. The neck should sit high and close to the skin without causing discomfort. Your arms should be able to rotate freely overhead without the suit pulling across the shoulders. There should be no significant air pockets, particularly in the torso, as these will fill with water and reduce the suit's effectiveness. If the suit causes restricted breathing or significant shoulder tightness, it may be too small.

How do you put a triathlon wetsuit on?

Allow at least ten minutes to put on a triathlon wetsuit properly. Start by placing a plastic bag over each foot to help slide your foot through the ankle opening without catching on the neoprene. Pull the suit up gradually in small increments from the ankles, working your way up to the hips before pulling the torso and shoulders into place. Never pull the wetsuit up by gripping the neck or seams as this can cause tearing. Apply a small amount of wetsuit-safe lubricant to the neck, wrists and ankles before closing the zip to prevent chafing. Take your time to smooth out any material bunching as you go, particularly around the knees, hips and underarms.

How should I clean and take care of my wetsuit?

Rinse your wetsuit thoroughly in cold fresh water immediately after every use to remove salt, chlorine and other residue. Do not use hot water as this degrades neoprene over time. Turn the suit inside out and hang to dry in a shaded area away from direct sunlight. UV exposure breaks down neoprene and shortens the life of the suit significantly. Do not tumble dry, machine wash or iron. Store the suit flat or hanging and avoid folding or compressing it for extended periods as this can crease the neoprene permanently. Use only wetsuit-specific lubricants on zip mechanisms and skin contact points, not petroleum-based products.

How long should a triathlon wetsuit last?

With proper care, a quality triathlon wetsuit should last three to five years of regular use. The main factors that shorten a wetsuit's life are UV exposure, improper storage, using petroleum-based products on the neoprene, and pulling the suit on and off roughly. Signs that your wetsuit needs replacing include seams that are separating, neoprene that has lost its elasticity and stretch, and tears or holes that compromise the suit's seal. A well-maintained suit that is rinsed and stored correctly after every use will comfortably reach the upper end of that lifespan.

Are triathlon wetsuits allowed in races in NZ?

Yes. All wetsuits in our range are approved for use in events sanctioned by World Aquatics (formerly FINA), World Triathlon, Ironman and USAT. In triathlon racing, wetsuit use is typically governed by water temperature. Most race organisations permit wetsuits in water temperatures below 20 degrees Celsius and mandate them below 14 degrees. Above 22 degrees, wetsuits are generally prohibited. Individual race rules vary, so always check the specific race guidelines before your event. NZ events typically follow Triathlon NZ guidelines, which align with World Triathlon standards.

Do I need a wetsuit for open water swimming in NZ?

For most open water swimming in NZ, a wetsuit is strongly recommended. NZ water temperatures vary considerably by region and season, and even in summer many coastal and freshwater swimming locations are cold enough to cause discomfort or increase the risk of cold water shock on longer swims. Beyond warmth, a wetsuit improves your buoyancy and body position in the water, which is particularly beneficial for beginner open water swimmers. For short swims in warm northern waters during summer, an experienced swimmer may choose to swim without one. But for most conditions and most swimmers, a wetsuit adds both safety and performance.

What thickness of wetsuit do I need for open water swimming in NZ?

Triathlon and open water wetsuits typically range from 3 to 5mm in thickness, with varying thickness across different panels of the suit. Most suits in our range use 2mm neoprene around the shoulders and arms for flexibility, 3mm across the upper chest and legs for thermal protection, and 4mm in the core for buoyancy and support. This balanced construction suits the majority of NZ open water conditions throughout the year. For extremely cold southern waters or winter swimming, additional thermal layers worn underneath the wetsuit may be worth considering.

Read our guide to open water swimming in NZ for tips on getting started, staying safe and what gear to bring. Browse our full range of swimwear and adults swimming goggles at Swim Safe.