How Do Wetsuits Work: Beginner’s Guide

For more than 50 years, Rip Curl wetsuits have helped shape surfing’s evolution, unlocking chilly southern breaks, icy reefs, and winter barrels that were once out of reach. They’ve let us surf longer, warmer, and with more confidence in cold Aussie waters.

But how does a wetsuit work?

We’re breaking it down for you, from why surfers wear wetsuits to how they keep you warm, how they should fit, and other common questions.

Read on and rubber up!

Why Do Surfers Wear Wetsuits?

Australian waters change temperature dramatically from one coast to another, but surfing’s a year-round obsession. That’s why wetsuits are essential. They keep you warm, comfortable, and safe when the mercury drops.

Surfing demands explosive power and quick reactions, but cold water can drain that fast. As your body tries to conserve heat, coordination fades, extremities go numb, and even paddling can feel like hard work. In really cold conditions, the risk of hypothermia becomes real.

Wetsuits (and accessories like booties and gloves) are the answer. They maintain your body’s warmth so you can surf longer, stay sharp, and enjoy the lineup no matter the season. And while old-school wetties were thick, stiff, and heavy, today’s designs are lightweight, flexible, and seriously warm — a far cry from the clunky suits of the past.

How Does a Wetsuit Work?

So, what does a wetsuit do? In simple terms, it keeps you warm. A wetsuit acts as a thermal barrier, helping your body retain heat even in cold water.

When you paddle out, a small layer of water slips between your skin and the suit. Your body quickly warms that layer, and it becomes insulation, holding warmth in and blocking cold out. That’s how a wetsuit keeps you warm and performing, even when the water’s icy.

What Is a Wetsuit Made From?

Wetsuits aren’t designed to keep you dry; they’re designed to control temperature. Most are made from neoprene, a soft, flexible rubber that traps heat and stays stretchy even when the water’s cold.

Different neoprene thicknesses are used for different temperatures, helping you balance warmth and movement.

Wetsuit Thickness Explained

Wetsuit thickness is measured in millimetres and varies depending on how cold the water is and how much warmth you need.

• Warmer water (20°C and above): Short spring suits or 2mm steamers are ideal.
• Cooler water (14–19°C): Go for a 3/2mm. That’s a great all-rounder for most Aussie coasts.
• Cold water (below 14°C): A 4/3mm or 5/4mm fullsuit keeps you toasty in southern regions and winter sessions.

Most modern wetsuits use multi-thickness panels, meaning thicker neoprene at the core for warmth, and thinner under the arms and shoulders for flexibility, so you can stay warm and move freely.

How Should a Wetsuit Fit?

A proper fit makes all the difference. A wetsuit should feel snug, almost like a second skin, without being restrictive. Too loose and water flushes in; too tight and you’ll struggle to move.

Look for:

• A firm but comfortable neck seal
• No air pockets or gaps
• Full coverage at the wrists and ankles
• Easy mobility through shoulders and knees

Try moving around — paddle, twist, squat. If it feels natural, you’ve found the right fit.

What Do You Wear Under a Wetsuit?

You don’t need to wear anything under your wetsuit; that’s how most surfers roll. But it’s all about comfort and conditions. In warmer temps, go with just your suit. In colder climates, a thermal rashie or underlayer can add extra warmth.

How to Get the Most Out of Your Wetsuit

A good wetsuit can last for years if you treat it right. If you leave your suit out in the sunshine, drag it round the car park, pee in it, and never properly wash it out, you’ll be lucky to get more than a single season. Here’s how to keep your suit in peak condition:

• Rinse it in fresh, cool water after every surf
• Hang it in the shade (not in direct sunlight)
• Use a wide hanger or fold it at the waist
• Wash occasionally with a mild wetsuit shampoo

Look after your gear, and your seams will stay watertight season after season. Check out our complete Wetsuit Care Guide for even more hot tips.

Can I Machine Wash or Dry My Wetsuit?

Never. Washing machines and dryers will destroy your suit’s seams and neoprene faster than a closeout set. Stick to hand rinsing and air drying in the shade.

Do Wetsuits Stretch Over Time?

Yes, all wetsuits will loosen slightly with use. That’s normal. Regular cleaning and proper storage help maintain shape, flexibility, and warmth.

How to Clean a Wetsuit

Keeping your wetsuit clean is the best way to make it last. After every surf, give it a good rinse in fresh, cool water to wash away salt, sand, and sunscreen. Every so often, use a gentle wetsuit shampoo or neoprene cleaner to help your suit stay soft, flexible, and smelling fresh.

Regular cleaning prevents both natural and manmade elements from breaking down the nylon and rubber, and it’ll keep those seams watertight for seasons to come.

How to Fix a Tear or Patch a Wetsuit

For small tears, a wetsuit repair kit or patch glue works fine. For bigger fixes, it’s best to leave it to the experts.

Rip Curl offers a three-year warranty on stitching and twelve months on materials like neoprene, knee pads, liquid tape, and zips.

Read the full Wetsuit Warranty for more information.

Can You Cut a Wetsuit?

You can cut your wetsuit, but know that there’s no going back.

Cutting a fullsuit into a springsuit might sound good for warmer days, but once cut, the openings lose their sealed finish. That means less warmth and more water flow.

Are Wetsuits…? (Quick Answers)

UV Protective? Yes.
Wetsuits naturally block UV rays where they cover your skin.

Waterproof? Sort of.
They’re water-resistant, not watertight. A thin layer of water is meant to enter for insulation.

Buoyant? Yes.
Wetsuits enhance your body’s natural buoyancy thanks to tiny air bubbles within the fabric.

Protective against jellyfish stings? Yes.
Wetsuits provide a protective barrier, keeping you safe from painful, potentially dangerous jellyfish stings.

Explore Rip Curl Wetsuits

Wetsuits are an essential part of surfing in Australia — from Torquay winters to tropical QLD mornings. They keep us warm, safe, and comfortable, letting us surf all year round.

Even better? Rip Curl wetsuits come in a huge range of styles and thicknesses, designed to suit every surfer and every condition.

Dive into our Men’s Wetsuit Collection and Women’s Wetsuit Collection to find your perfect fit and keep chasing waves wherever The Search takes you.