For many swimmers—especially those venturing into open water—a wetsuit seems like an essential piece of gear. But is it truly necessary, or just a helpful extra? Whether you’re preparing for a triathlon, planning ocean swims, or simply swimming for fitness, your environment and goals will largely determine whether a wetsuit is right for you.
Let’s break down the benefits, when you might need one, and when it’s okay to swim without.
What a Wetsuit Does
Thermal Protection
One of the main reasons swimmers wear wetsuits is to stay warm in cooler waters. A swimming wetsuit is made from neoprene, which provides insulation by trapping a thin layer of water between your body and the suit. Your body warms this layer, helping to maintain your core temperature and reduce the risk of hypothermia.
Buoyancy Support
Wetsuits help keep you more buoyant, which reduces drag and fatigue. This can be particularly helpful for beginner swimmers or anyone swimming long distances, as it allows you to conserve energy and maintain better body position in the water.
Hydrodynamics
The smooth neoprene surface of a wetsuit reduces friction in the water. Many swimmers notice improved speed and efficiency, especially over longer swims. In fact, some triathletes choose wetsuits specifically for this performance advantage.
When You Might Need a Wetsuit
Open Water Swimming
If you’re swimming in natural environments like the ocean, lakes, or rivers, a wetsuit can be a practical choice. These waters can be colder and less predictable than a heated pool, making the insulation and buoyancy a valuable asset.
Cold Water Conditions
As a rule of thumb, if the water temperature is below 22°C, a wetsuit is highly recommended. In colder parts of Australia, especially during winter, a wetsuit can make your swim safer and far more comfortable.
Triathlons and Ocean Races
Most triathlons allow wetsuits below certain water temperatures, and many swimmers wear them even when optional for the added speed and warmth. Wetsuits are designed to support long-distance swimming and help reduce exhaustion across multiple race stages.
When You Might Not Need One
Pool Swimming
Pools are typically heated and controlled, meaning you won’t need extra insulation. Wetsuits also aren’t ideal in chlorinated water as it can break down the neoprene material over time.
Warm Water Conditions
In warmer climates or during summer, a wetsuit might not be necessary—and could even cause you to overheat. For short swims, casual beach outings, or laps in a tropical sea, many swimmers are more comfortable in lighter swimwear.
Wetsuit Alternatives for Warm Conditions
If a full wetsuit feels like overkill, there are alternatives:
- Rash vests for UV protection and slight warmth
- Thermal tops or vests for core insulation
- Neoprene shorts for lower body warmth
- Layered swimwear for flexibility in changing conditions
For tips on how to layer your gear for temperature control, check out our guide to Layering Techniques for Cold Water Sports.
Factors to Consider Before Buying
Before purchasing a wetsuit, consider:
- Swimming location – open water vs pool
- Water temperature – seasonal changes matter
- Your tolerance to cold – some people feel the chill more than others
- Activity type – recreational, training, triathlon, ocean races
- Budget – a wetsuit is an investment in performance and comfort
Bringing It All Together
So, do you really need a wetsuit for swimming? The answer depends on where, when, and how you swim. While not always essential, a wetsuit can offer performance advantages and critical protection in open or cold water.
At Sharkskin Australia, we design premium thermal and watersports gear for all conditions. Whether you’re tackling winter swims or training for your next triathlon, our range of wetsuits and swim layers can help keep you warm, buoyant, and focused on your performance. Explore our Wetsuits & Thermal Gear Collection to find the right gear for your swimming journey.