How to Prevent Rashguard Chafing While Surfing

That hot, raw patch under your arm can turn an all-time morning into a slow paddle back to the beach. If you want to prevent rashguard chafing while surfing, the answer is rarely one magic product. It comes down to fit, fabric, seam placement and a couple of small habits before you paddle out.

Chafing is especially common on long summer sessions, when salt dries on the skin, your shoulders are working through every stroke and the wind is up on the way home. The good news is that a rashie should help you stay out longer, not give you another reason to call it early.

Start with a rashguard that actually fits

The most common cause of rashguard rub is a size that is almost right. A rashie that is too loose fills with water and shifts across your chest, underarms and ribs every time you paddle. One that is too tight stretches the fabric and seams hard against your skin, particularly around the neck and shoulders.

Aim for a close, comfortable fit that sits against the body without restricting your paddle stroke. You should be able to reach forward, twist and pop up without feeling the neckline pull or the sleeves bite into your armpits. In the changing room, mimic a few paddling motions rather than judging the fit while standing still.

Fit can change depending on the conditions, too. A lightweight surf t-shirt or looser rashie can feel spot-on for a quick, warm-water splash, but may move around more during a two-hour paddle in messy surf. For longer sessions, a more secure fit usually wins.

Check the neckline and underarms first

You can usually predict where a rashguard will chafe before its first surf. Run your fingers along the inside of the collar, armholes and side seams. Rough thread ends, bulky joins and raised printed labels are all potential trouble spots once saltwater gets involved.

The neck is a classic friction zone, especially if you duck dive often or wear a wetsuit over the top. If the collar feels stiff or high when dry, it may rub when you are constantly looking over your shoulder for the next set. Underarm seams matter just as much. Your paddle stroke repeats thousands of times in a session, so even a tiny raised seam becomes a proper nuisance.

Choose smooth seams and quick-drying fabric

Not all rashies are built the same. Look for flatlock or flat seams, which sit lower against the skin than chunky, raised stitching. They are not a guarantee of zero rubbing, but they reduce the pressure points that become painful after a few hours chasing swell.

Fabric matters as well. A quality stretch fabric should move with your shoulders rather than fight them. It should also dry quickly between surfs. A rashie that stays damp, salty and stiff in the back of the ute is more likely to irritate you the next day.

For high-sun days on the Sunshine Coast, a long-sleeve rashguard adds welcome coverage across the shoulders and back. The trade-off is a little more fabric around the arms, so make sure the sleeves are snug enough not to bunch at the elbow. For warm-water sessions and beach breaks where you want less material, a short-sleeve cut can feel freer, provided the arm opening sits smoothly.

Use anti-chafe protection before you need it

If you already know where you rub, get ahead of it. A thin layer of anti-chafe balm or zinc-based barrier on the usual hotspots can make a big difference. Apply it to clean, dry skin before getting wet, focusing on the underarms, nipples, sides of the ribs, waistband line and back of the neck where needed.

Petroleum-based products can work for some surfers, but check how they interact with your wetsuit or rashie fabric and avoid overdoing it. Too much can leave your gear slippery, collect sand and feel unpleasant once you are out of the water. A purpose-made anti-chafe stick is often neater for tossing in the surf bag.

If you are wearing boardshorts over your rashie, make sure the waistline is not folding or catching the fabric underneath. That combination can rub across the lower back and stomach during a long paddle. A simple adjustment before you walk down the footpath to the beach is easier than trying to fix it in the lineup.

Keep salt and sand out of the equation

Saltwater is part of the deal. Salt crystals left on your skin or trapped in fabric, though, can turn mild friction into a nasty rash. Rinse your rashie in fresh water after every surf, even if you are heading back out tomorrow. Give extra attention to the collar, underarms and seams where salt tends to hang around.

Do the same for your skin. A quick freshwater rinse at the beach shower is ideal, but a proper rinse when you get home is better than leaving salt on all afternoon. Dry yourself properly and change out of wet gear rather than sitting around in it while you grab a coffee or check the charts for tomorrow.

Sand is another quiet culprit. A single grain caught under a snug rashguard can feel harmless at first, then become a sharp point of friction after twenty minutes of paddling. Shake out your rashie before pulling it on and avoid dragging it through dry sand while changing. It is a small move that pays off when the surf is good and you want one more.

Do not ignore worn-out gear

A favourite rashie can earn plenty of miles, but fabric eventually loses stretch and seams start to wear. When it becomes baggy in the body, curls around the collar or feels rough in the same spot every session, it may be time to retire it from surf duty.

Sun, chlorine, salt and repeated washing all take their toll. Rinse gear in cold fresh water and let it dry in the shade where possible. Avoid leaving it baking on the dash or tangled in a wet towel for days. Heat can break down stretch fibres, while a damp surf bag is where fabric starts to smell and lose its best feel.

You do not need a drawer full of gear, but rotating between two rashies is useful if you surf often. It gives each one a chance to rinse, dry and hold its shape. Pullindeep keeps the focus on comfortable, durable surfwear because the best kit is the stuff you barely notice once you are deep inside the barrel.

How to prevent rashguard chafing while surfing in a wetsuit

Wearing a rashie under a wetsuit can prevent wetsuit rub, particularly around the neck, chest and underarms. But it only works when the layers sit flat. A loose rashie underneath can bunch at the shoulders or waist and create more friction than the wetsuit alone.

Choose a close-fitting layer with smooth seams, then take an extra moment when pulling on the suit. Flatten the rashie across your back and chest before zipping up. If you feel a fold at the neck or under an armpit, fix it on the beach. It will not settle itself once you are paddling through a head-high set.

For a short, cooler session, some surfers prefer no layer under the wettie at all and use anti-chafe balm instead. It depends on your skin, your suit and where you normally rub. Test the setup on a shorter surf before committing to it on a long winter mission.

Treat a chafed patch early

When skin is already raw, more friction is only going to make it worse. Rinse the area with fresh water, pat it dry and give it time away from rubbing gear. A gentle moisturiser or suitable skin barrier may help, but avoid putting heavily fragranced products on broken skin.

If the area is weeping, very painful, swollen or looks infected, skip the surf and get advice from a pharmacist or GP. No wave is worth turning a small rash into a problem that keeps you out for a week.

Comfort is not the flashiest part of surfing, but it protects the good part: staying in the water until your arms are cooked, the wind turns offshore and you finally catch that one you will talk about all the way home.