Why Summer Is the Most Ageing Season, and How to Protect Your Skin

Ask most people which season is hardest on their skin and they will say winter. Cold wind, central heating, dry cheeks. Reasonable guesses, but wrong. In this video, I explain, as a doctor and the founder of Wellface, that the season that ages skin fastest is actually summer, and the reason is simple. Sun exposure is the single biggest factor in how quickly skin ages, and summer is when we get the most of it.

It is easy to underestimate because so much of the damage is invisible at first. A day in the garden, a walk to lunch, the drive to work with sun coming through the window. None of it feels dramatic. Yet the changes are adding up quietly, deep in the skin, long before you see them in the mirror. By the time pigmentation, fine lines and a loss of firmness show up on the surface, the groundwork was laid years earlier.

The good news is that photoageing, the technical name for sun-induced ageing, is largely preventable. It is also treatable. Understanding what UV light actually does to your skin makes it far easier to see why daily protection matters, and why the right in-clinic treatments before and after summer can make such a difference.

Why the sun ages skin more than time does

There are two kinds of ageing at play in your skin. The first is chronological ageing, which is dictated by your genes and the years passing. You cannot do much about that. The second is photoageing, driven by ultraviolet light, and it is thought to be responsible for the majority of the visible changes we associate with getting older. Wrinkles, uneven tone, dark patches, a crepey texture and skin that no longer springs back the way it used to.

You can see the difference for yourself. Compare the skin on the inside of your upper arm, an area rarely exposed to the sun, with the skin on the back of your hand or your face. The protected skin is usually smoother, more even and firmer. That gap between the two is photoageing in action.

Ultraviolet light comes in two forms that matter here. UVB rays are shorter and mostly hit the surface layers, causing sunburn and the tan we sometimes chase. UVA rays are longer and penetrate far deeper, reaching down into the dermis where your collagen and elastin live. UVA levels stay relatively high throughout the day and across the seasons, which is part of why sun protection is never really an off-duty task.

What is happening beneath the surface

When UV light reaches the skin, it does more than change how it looks on top. It generates free radicals, unstable molecules that trigger oxidative stress and set off a cascade of damage in the deeper layers. This is where the real ageing happens.

Collagen and elastin are the proteins that give skin its structure, firmness and bounce. UV exposure switches on enzymes that break these proteins down, while at the same time slowing the production of fresh collagen. Over years of daily exposure, the skin repairs itself imperfectly, laying down disorganised fibres instead of the neat scaffolding it started with. The result is the structural collapse you recognise as wrinkles, sagging and a loss of that youthful tautness. As I often put it, the sun does not just mark the surface, it dismantles the framework underneath.

Sun damage is more than pigmentation

When people think of sun damage, they usually picture brown spots. Pigmentation is certainly part of it. UV exposure pushes the skin to produce more melanin as a defence, and over time this shows up as sun spots, uneven patches and conditions like melasma. Dehydration is another visible sign, with skin looking dull, tight and lacklustre after too much sun.

But those are the superficial layers talking. The deeper story is the collagen and elastin breakdown described above, and that is what drives the changes that are hardest to reverse. Pigmentation can often be lifted or evened out. Rebuilding lost structural support is a bigger job. This is why prevention carries so much weight, because it protects the parts of your skin that are slowest and most difficult to restore.

It is also worth remembering that lowering your UV exposure does more than keep skin looking younger. It reduces your risk of skin cancer too. Sun protection is a health habit as much as a cosmetic one.

SPF 50 every day, all year round

Here is the part that is genuinely non-negotiable. Wear a broad-spectrum SPF 50 every single day, whatever the season and whatever the weather. Broad-spectrum matters because it means the product shields you from both UVA and UVB, not just the burning rays.

The common objection is that sunscreen is only for beach days and blazing heat. It is not. UVA passes through cloud cover with barely any reduction, so a grey British afternoon still delivers a meaningful dose. It also travels through window glass, which is why time spent driving, sitting at a desk by a window or on a plane all counts as UV exposure. Photographers have documented cases of drivers whose sun-facing side shows noticeably more ageing than the other. Your skin does not know it is indoors.

How to use sunscreen properly

The way you apply SPF matters as much as choosing to wear it. A few habits make all the difference:

• Use enough. Most people apply far too little. For the face, neck and ears you want roughly a two-finger length of product, applied as the last step of your skincare before makeup.
• Reapply through the day. Sunscreen wears off with time, sweat and touching your face. Top it up every couple of hours when you are outdoors, and after swimming.

Beyond the cream itself, sensible shade in the middle of the day, a wide-brimmed hat and good sunglasses all reduce the load your skin has to cope with. None of this means avoiding the outdoors or missing out on summer. It means enjoying it while giving your skin a fighting chance.

Preparing and repairing skin around summer

Daily protection is the foundation, but it is not the whole strategy. The months before and after summer are a valuable window for treatments that either prepare the skin for the season ahead or repair the damage that has crept in over it.

Good skincare does a lot of quiet work here. Antioxidants such as vitamin C help neutralise the free radicals generated by UV exposure and support brighter, more even skin. Retinoids, prescribed and used correctly, encourage cell turnover and stimulate collagen, which is why they are a mainstay for treating photoageing. Medical-grade skincare, chosen for your skin by a doctor, tends to be more concentrated and better formulated than what you find on the high street.

In clinic, there is a broad menu depending on your concerns. For pigmentation and sun spots, treatments like BBL Hero and MOXI target uneven tone and help fade the marks left by UV. For texture, fine lines and deeper collagen loss, resurfacing options such as Morpheus8 and the Secret Pro CO2 laser work below the surface to rebuild structure. Skin boosters, Profhilo and polynucleotides address hydration and skin quality, helping tired, sun-stressed skin recover its glow. Hydrafacial and skin peels offer gentler resurfacing with little or no downtime. The right choice depends on your skin, your history in the sun and what you want to change, which is exactly what a consultation is for.

Timing treatments around sun exposure

Some treatments, particularly lasers and stronger peels, are best done when your sun exposure is lower, because freshly treated skin is more vulnerable to UV and to pigmentation. Autumn and winter are often ideal for this kind of resurfacing work. The lead-up to summer is a good time to focus on prevention, skin quality and building a solid SPF habit. I can help you plan the year so that each treatment lands at the right moment.

Common questions about sun damage and skin ageing

Is it too late if I already have sun damage?

No. It is never too late to start protecting your skin, and doing so slows further damage straight away. Many signs of existing photoageing, from pigmentation to fine lines and texture, respond well to the right combination of skincare and in-clinic treatment. The sooner you start, the more you protect.

Do I really need SPF indoors or in winter?

Yes, and this surprises a lot of people. UVA rays reach you through windows and are present all year, even on overcast days. If you spend time near daylight at home, in the car or at your desk, daily broad-spectrum SPF still earns its place. Think of it as a routine step rather than a summer-only extra.

Does a tan protect my skin?

A tan is a sign that damage has already occurred. It is your skin producing extra melanin to try to shield itself from further UV, not a healthy base layer. The natural protection a tan offers is minimal, and the process that creates it is the same one that ages your skin and raises cancer risk.

What is the difference between UVA and UVB?

UVB rays are the main cause of sunburn and mostly affect the surface of the skin. UVA rays penetrate more deeply into the dermis, where they drive collagen and elastin breakdown and much of the long-term ageing you see. A broad-spectrum SPF protects against both, which is why that label is worth checking.

Which treatment is best for my sun damage?

That depends entirely on what you are seeing and how your skin behaves. Pigmentation, texture, laxity and dehydration each respond to different approaches, and often a combination works best over time. Rather than guessing, a face-to-face assessment with me or one of the Wellface doctors will match the treatment to your skin and your goals.

Book a skin consultation at Wellface

Summer does not have to cost you your skin. With the right daily protection and a plan built around your skin type and history, you can enjoy the season and still look after the collagen and tone you want to keep. If you would like a considered, doctor-led assessment of your sun damage and a treatment plan that fits the year ahead, I would be glad to help at our Cobham, Esher and Wimbledon clinics. Get in touch to arrange a consultation with me and start protecting your skin properly.