How to Protect Your Hair on Holiday

There's a particular kind of disappointment that hits somewhere around day three of a beach holiday. You came away with great hair. Now it's dry, rough, oddly textured, and vaguely greenish in the ends. The sun, the sea, the pool — sometimes all three in a single day — have done their work, and no amount of conditioner in the hotel bathroom is fixing it.

The good news is that holiday hair damage is almost entirely preventable. You don't need an elaborate routine or a suitcase full of products. You need to understand what's actually happening to your hair — and a handful of habits that become second nature within a day or two.

What's Actually Damaging Your Hair on Holiday

Before the solutions, it helps to understand the problem. Holiday environments expose your hair to a combination of stressors that it rarely faces at home — often simultaneously.

UV radiation breaks down the proteins in the hair shaft, particularly melanin and keratin. The result is hair that becomes progressively weaker, more porous, and less able to retain moisture. Colour-treated hair is especially vulnerable — UV exposure accelerates fade and can shift warm tones to brassiness or dullness. And just like skin, the damage accumulates over the course of a holiday even if individual days don't seem particularly intense.

Saltwater is dehydrating by nature. When seawater evaporates from the hair shaft, it leaves salt crystals behind that draw moisture out of the cortex, leaving hair dry, rough, and prone to tangling and breakage. The longer salt sits in the hair without being rinsed out, the more damage it causes.

Chlorine is one of the most aggressive hair aggressors you'll encounter. Swimming pool water is treated with chlorine specifically to kill bacteria — and it's indiscriminate. Chlorine strips the hair's natural oils, lifts the cuticle, and over repeated exposure causes significant protein loss. For anyone with blonde or highlighted hair, chlorine also has an oxidising effect that can produce that unwanted greenish cast — caused by a reaction with copper compounds in the water, which chlorine makes more reactive.

Heat and humidity — or in some climates, dry desert heat — disrupt the hair's moisture balance in different ways. High humidity can cause the cuticle to swell, leading to frizz and loss of definition. Dry heat accelerates moisture loss from the shaft, compounding the drying effects of sun and salt.

Understanding these mechanisms is what makes the difference between protection that actually works and the usual advice to "use conditioner."

Before You Go: Preparation Matters

The best time to start protecting your holiday hair is before you leave.

Get a trim. Split ends are significantly more vulnerable to the combined assault of UV, salt, and chlorine than healthy ends. A trim a week or two before you travel removes existing damage and gives you a better starting point — meaning any damage that does occur will affect healthy hair rather than ends that were already compromised.

Do a deep conditioning treatment. In the week before your holiday, use a deep conditioning mask or a protein treatment to maximise your hair's moisture and strength reserves. Think of it as building up a buffer. Hair that goes into a beach holiday already well-hydrated and structurally sound will fare significantly better than hair that's starting from a depleted baseline.

Consider your colour. If you're planning to get your hair coloured before a holiday, time it carefully. Freshly coloured hair is more porous and more vulnerable to fading — ideally, you want colour done at least a week before you travel, giving the cuticle time to settle and close.

In the Sun: Protecting Against UV Damage

Wear a hat. This is the single most effective thing you can do. A wide-brimmed hat or a tightly woven scarf provides physical UV protection for both your scalp and your hair — something that no product can fully replicate. It also keeps the hair cooler, which reduces moisture loss.

Use UV protection for your hair. Hair SPF products — typically sprays or leave-in treatments containing UV filters — provide meaningful protection, particularly for colour-treated hair. Apply before heading out, focusing on the lengths and ends where UV damage tends to be most visible. Reapply after swimming or if you've been sweating. Look for products that also contain antioxidants, which help neutralise the free radical damage that UV exposure generates.

Avoid heat styling outdoors. The combination of heat tools and direct sun exposure is particularly harsh on the hair. If you're air-drying on holiday anyway, great — that's exactly the right call. If you do use heat tools, do so in the shade or indoors, and always use a heat protectant.

In the Water: Sea, Pool, and Everything In Between

Wet your hair before you swim. This is one of the most effective and underused strategies for protecting hair in the pool. Hair is porous — it absorbs liquid. If you saturate it with fresh water before entering a pool or the sea, it has far less capacity to absorb chlorinated or salty water. It won't eliminate the exposure, but it significantly reduces how much chlorine or salt penetrates the shaft.

Apply a protective oil or conditioner before swimming. A coating of coconut oil, argan oil, or a swim-specific leave-in treatment on the lengths and ends creates a barrier between your hair and the water. This is particularly effective for reducing chlorine absorption in the pool. Apply generously before getting in.

Rinse immediately after swimming. Don't let salt or chlorine sit in your hair any longer than necessary. As soon as you're out of the water, rinse with fresh water — even if it's just a quick shower head or an outdoor rinse point at the pool. This removes the majority of salt and chlorine before they have time to cause prolonged damage. If fresh water isn't immediately available, spritz your hair with a bottle of still water to dilute the concentration.

Use a swim cap for serious protection. A well-fitting silicone swim cap (not latex, which creates too much friction and can cause breakage) significantly reduces the amount of chlorinated water that reaches your hair. It's the most direct form of protection for frequent or serious swimmers. It won't keep hair completely dry, but it dramatically reduces exposure compared to swimming uncovered.

For colour-treated hair, be extra cautious with pools. If you have blonde, highlighted, or colour-treated hair, chlorine is a particular risk. In addition to the strategies above, consider using a chelating or clarifying shampoo after pool swims to remove chlorine and copper deposits before they oxidise. Some swimmers also apply a purple or blue toning product after washing to counteract any greenish or brassy shifts.

Daily Hair Care on Holiday

Swap your regular shampoo for a gentler formula. Your everyday shampoo — particularly if it's clarifying or volumising — may be too stripping for hair that's already dealing with sun and salt. On holiday, reach for something sulphate-free and hydrating, and resist the urge to wash too frequently. Washing every day strips the scalp's natural oils faster than they can be replenished — every other day is usually sufficient, or rinse with fresh water on non-wash days.

Use a leave-in conditioner daily. Leave-in conditioner is your best friend on holiday. Apply it to damp hair after washing or after a fresh water rinse, focusing on the mid-lengths and ends. It provides an additional layer of moisture and protection, helps with detangling (important when hair has been exposed to salt and wind), and makes hair more manageable without weighing it down.

Detangle with care. Salt and sun make hair significantly more prone to tangling and breakage, and attempting to drag a brush through dry, tangled holiday hair is one of the fastest routes to damage. Use a wide-tooth comb on damp, conditioner-coated hair, working from the ends up to the roots rather than forcing from the top down. Be patient — it takes longer, but the reduction in breakage is significant.

Embrace lower-maintenance styles. Braids, buns, twists, and other protective styles do double duty on holiday — they keep hair contained and away from the elements, reduce tangling, and minimise the damage that comes from hair whipping around in wind and salt air. A loose braid before swimming is one of the most effective ways to reduce the amount of surface area exposed to chlorine or seawater.

After Your Holiday: Recovery and Repair

Even with the best precautions, a couple of weeks in the sun and sea will take some toll on your hair. The good news is that with the right post-holiday care, recovery is straightforward.

Start with a clarifying shampoo. After your holiday, use a clarifying or chelating shampoo once to remove salt, chlorine, sunscreen residue, and product build-up that has accumulated. This resets the hair's surface and allows subsequent treatments to penetrate properly.

Follow immediately with intensive moisture. After clarifying, apply a deep conditioning mask — leave it on for as long as the packaging suggests, or longer if your hair is particularly dry. Pair it with heat (a warm towel or a shower cap traps warmth and helps the product penetrate more effectively). This is the moment to rebuild the moisture that the holiday stripped away.

Consider a protein treatment if your hair feels weak or stretchy. Hair that has lost significant protein — as a result of chlorine, UV, or chemical exposure — often feels mushy, stretchy when wet, or snaps easily. A protein treatment or bond-building product helps restore structural integrity to damaged strands.

Get a trim if needed. If your ends feel rough, look dull, or have visible damage, a light trim after your holiday removes the worst of it and allows healthier hair to take over.

A Note on Hair Loss and Seasonal Shedding

It's common to notice increased hair shedding in the weeks following a holiday — sometimes dramatic enough to be alarming. This is typically telogen effluvium triggered by the stressors of travel, sun exposure, and nutritional shifts while away. It usually resolves on its own within a few months.

However, if shedding continues, increases, or was already a concern before you travelled, it's worth having it properly assessed. Holiday shedding can occasionally unmask or accelerate an underlying hair loss condition that warrants treatment. Early assessment always gives you more options.

If you'd like to discuss hair health concerns or explore professional treatments including polynucleotides for hair loss, book a consultation at Karwal Aesthetics, Mayfair →