How to choose the right hair sunscreen?

Protecting your hair from the sun isn’t only about appearance – it’s also essential for keeping it healthy and shiny. UV rays, sea salt and chlorine can all weaken the hair fibre, leaving it dry, lacklustre and prone to breakage. Just as your skin needs the right sun protection, your hair also deserves care to stay soft and radiant all summer long.

In this guide, we’ll explain how to choose the best sun protection for your hair – whether that’s a protective oil, an anti-UV spray or an all-in-one sun care product – so you can keep your hair looking and feeling its best, from the beach to the pool.

What is hair sunscreen?

Hair sunscreen is your summer essential for healthy, radiant hair. It’s not just another conditioner – it’s a treatment designed to protect your strands and colour from the sun, sea salt and chlorine. With built-in UV filters, it creates an invisible shield that helps your hair stay hydrated, smooth and vibrant.

You’ll find it in different textures, from lightweight sprays and milky lotions to nourishing oils and creams. Many formulas also blend in caring ingredients like coconut oil, aloe vera or shea butter, so you get protection and treatment in one step.

Simply apply before heading out in the sun, and top up while you’re at the beach or by the pool – just as you would with your skin sunscreen.

Why protect your hair from the sun?

Keep your hair strong and healthy

UV rays weaken keratin – the key protein that gives your hair its strength. This can lead to dryness, breakage and split ends. A hair sunscreen works like a shield, helping to protect the fibre and keep its natural flexibility.

Protect your colour’s shine

Whether your hair is natural, coloured or highlighted, the sun speeds up pigment oxidation, leaving it looking dull or altering its shade. Using a hair sunscreen oil or an anti-UV spray helps maintain colour intensity and shine for longer.

Shield your hair from sun, salt and chlorine

Summer often means sun and swimming – but sea salt and chlorine can make your hair even drier and more fragile. A hair sunscreen designed for the beach or pool works like a barrier, helping to reduce dryness and prevent the fibre from becoming porous under these combined stresses.

What do UV rays do to your hair?

How UV weakens keratin

Keratin is what gives your hair its strength and flexibility. Under the sun, UV rays break down its structure, leaving hair fragile, rough and prone to snapping. It’s a bit like your hair drying out from the inside. That’s where hair sunscreen comes in: with built-in UV filters, it forms a protective shield that helps keep keratin intact – and your hair strong, smooth and healthy all summer long.

How UV affects hair colour

UV rays trigger oxidation inside the hair fibre, breaking down natural or artificial pigments. On natural hair, this often shows up as uneven lightening, leaving it looking dull or washed out. On coloured or highlighted hair, the process speeds up fading and can even shift the original shade – blondes may turn brassy, while brunettes can pick up unwanted red tones. A hair sunscreen oil or anti-UV spray helps slow this process by forming a barrier that reduces UV penetration, keeping your colour vibrant and shiny for longer.

Intense dryness from UV

The sun works like a natural dehydrator. UV rays heat up the hair fibre, causing water inside it to evaporate quickly. The result? Hair that feels dry, dull and hard to detangle. Strands can swell, lose their softness and tangle more easily – a problem that’s even more noticeable on curly or textured hair, which is naturally more porous. A hair sunscreen enriched with hydrating ingredients like aloe vera or plant oils helps counteract this loss of moisture. By leaving a light protective film on the surface, it keeps your hair smooth and supple, preventing that straw-like feeling at the end of the day.

Damage to the hair cuticle

The cuticle is the hair’s outer shield, made up of tiny scales that overlap like roof tiles. Under UV exposure, these scales lift or crack, leaving the inner cortex unprotected. Once the cuticle is damaged, hair loses its shine because it no longer reflects light evenly. It also becomes more vulnerable to everyday stress, whether mechanical, chemical or heat-related. Using a hair sunscreen cream or anti-UV spray regularly helps smooth and strengthen the cuticle, reducing damage and keeping the surface sleek so your hair reflects light beautifully.

Weakened hair is more vulnerable

Once the sun has damaged your hair, it’s far more sensitive to other stress factors – from heat styling and pollution to wind, salt water and pool chlorine. With the cuticle scales already weakened, the fibre struggles to hold on to nutrients and moisture. This leads to a vicious cycle of dryness and breakage, with split ends appearing faster and hair gradually losing its density. A hair sunscreen designed for the beach or pool helps reduce these combined effects. It creates a protective barrier that limits how much these aggressors stick to the hair fibre, keeping it healthier for longer.

How to spot sun damage in your hair?

Dullness and loss of shine

One of the first signs of too much sun is a lack of shine. Hair looks flat and matte, as if covered with a veil. This happens when the cuticle scales lift and no longer reflect light properly. Instead of bouncing UV rays away, the fibre absorbs them, making hair appear even duller. Even naturally glossy hair can lose its radiance after just a few days of strong sun. Using a protective hair oil or anti-UV spray regularly helps keep the cuticle smooth and maintain your hair’s natural shine.

Dry, rough texture

After hours in the sun – especially with salt or chlorine – hair loses its internal moisture. It feels dry, coarse and less flexible to the touch. This is most noticeable on lengths and ends, the oldest and most fragile parts of the hair. The lack of water inside the fibre also causes uneven swelling, which makes styling harder. A hydrating hair sunscreen, applied before and after sun exposure, helps restore lost moisture so your hair feels softer, smoother and easier to manage.

Faded or washed-out colour

Sun exposure can visibly alter your hair shade, whether natural or coloured. Blondes may turn brassy or overly golden, brunettes can pick up reddish tones, and coloured hair tends to fade faster. The culprit is UV oxidation, which breaks down pigments inside the fibre. For dyed hair, the chemical structure of pigments is especially vulnerable, leading to quicker dullness and loss of intensity. A UV-protective hair spray or a hair oil enriched with protective filters helps slow this process, keeping your colour vibrant for longer.

Split ends from sun exposure

Split ends from sun exposure

The ends are the oldest and most fragile part of your hair – and the first to show damage. Sun, wind, salt and chlorine all weaken their structure, creating cracks in the cuticle that sometimes reach the inner cortex. The result? Ends that split into two or three strands, leaving hair looking messy even after styling. Once split ends appear, the only fix is a trim. But applying a hair sunscreen to lengths and ends helps protect the fibre, slowing down wear and keeping it sealed for longer.

Breakage and loss of density

Breakage and loss of density

Sun-damaged hair is far more fragile when brushed, tied tightly or exposed to heat styling tools. With the fibre weakened and less elastic, it snaps more easily, leaving hair looking thinner and less full. The effect is even stronger on chemically treated hair, such as coloured, bleached or straightened styles. Regular use of a hair sunscreen for beach and pool days, combined with nourishing care, helps reinforce the fibre and maintain healthy-looking density even after long sun exposure.

How to add hair sunscreen to your routine?

Prepare your hair before sun exposure

Before heading to the beach, pool or a long day outdoors, it’s essential to protect your hair fibre. Apply a generous amount of protective hair oil, UV spray or hair sunscreen cream to dry or damp hair, focusing on the lengths and ends where damage shows first. For best results, pick a water-resistant formula so protection stays effective even after swimming. This step creates an invisible shield around each strand, helping block UV rays while locking in moisture and keeping your hair soft.

Top up protection during the day

Just like your skin, your hair needs its sun protection reapplied to stay effective. After swimming or any intense activity, mist on your UV hair spray again or smooth a small amount of hair oil through the lengths. If your hair is fine or tends to get oily quickly, choose lightweight textures like mists or milky lotions that won’t leave a greasy film. This simple step keeps UV filters working all day long and helps prevent the build-up of sun, salt and chlorine damage.

Nourish and repair after sun exposure

At the end of the day, a nourishing ritual is key to restoring your hair fibre. Start with a thorough rinse in clean water to wash away salt, sand or chlorine. Follow with a gentle shampoo – ideally one formulated for sun-exposed hair – then apply a conditioner or mask rich in hydrating and repairing ingredients such as aloe vera, shea butter or coconut oil. This deep care step helps smooth the cuticle, replenish nutrients and keep your hair soft, shiny and resilient – ready for another day in the sun.

Why choose an all-in-one solution to protect and nourish your hair?

Choosing an all-in-one product that both protects and nourishes your hair fibre has clear advantages. These treatments usually combine UV filters to block harmful rays with hydrating and nourishing ingredients such as plant oils, aloe vera or shea butter. The result is double action: preserving keratin and colour while keeping hair soft and shiny.

A complete formula also makes your summer routine simpler. No need for a separate protector and moisturiser – one step is enough to shield against sun, salt and chlorine while strengthening the fibre. This type of care is ideal for travel, beach days or long hours outdoors.

For best results, go for a water-resistant formula suited to your hair type. That way, you’ll enjoy continuous protection and lasting comfort, even in the most demanding summer conditions.

Which hair sunscreen should you choose?

Protective hair oils

Rich and nourishing, hair oils create a protective film that helps limit UV damage while feeding the fibre. They’re especially well-suited to dry, thick or curly hair, which is often more prone to dehydration. Applied before and during sun exposure, these oils add shine and softness while preventing the straw-like effect caused by sun, salt and chlorine.

UV protection hair sprays

Lightweight and easy to use, sprays deliver instant protection without weighing hair down. Suitable for all hair types, they can be reapplied throughout the day – even on dry hair. Their fine texture absorbs quickly and shields effectively against UV rays, salt and chlorine. Perfect for daily use, they keep your hair soft and shiny all summer long.

Hair sun creams and milks

Creamy and enveloping, hair sun creams and milks provide long-lasting protection against summer aggressors. Their hydrating texture helps repair and strengthen the fibre while preserving colour. They’re ideal for coloured, highlighted or sensitised hair, acting as a complete treatment that protects, nourishes and softens. Perfect for a generous application before sun exposure.

Vichy

Vichy Capital Soleil Invisible cellular protection oil SPF50+ 200 ml

Invisible cellular protection dry oil with SPF50+ for high, lightweight sun defence.

(39)

£19.24

Made in France

Respectueuse

Respectueuse Sun protection oil SPF50 100 ml

This dry oil wraps skin and hair in an addictive sun-kissed fragrance while providing high SPF50 UV protection.

(0)

£21.92

Made in France Vegan

LA ROSÉE

LA ROSÉE Sunscreens Oil SPF50 150ml

A summer favourite, this non-greasy oil for face, body and hair has a light Vanilla Coco fragrance.

(5)

£25.14

Made in France

René Furterer

René Furterer Solaire Protective summer hair oil with shine effect 100 ml

Protective summer hair oil with a shine effect for sun-exposed hair.

(3)

£13.76

Apivita

Apivita Bee Sun Safe Hair Oil with Sun Filters 100ml

APIVITA Bee Sun Safe oil protects and preserves hair colour, moisturises and nourishes.

(2)

£11.08 £13.85

The sun, the sea and the pool are all part of summer fun – but they can be tough on your hair’s health and beauty. By adding the right hair sunscreen to your routine – whether an oil, spray or cream – you protect the fibre, colour and shine.

Give your hair the care it deserves, so you can enjoy every moment of summer while keeping it radiant, soft and full of vitality