Summer is the season most people love, but it is also the toughest on your hair. Between sun, sea salt, chlorinated pool water, heat and dry air, the hair fibre and scalp face several stress factors at once. The good news is that with a few sensible habits and the right cosmetic care, you can enjoy the season and keep your hair feeling soft, hydrated and protected. In this guide we explain what actually happens to your hair in summer and how to look after it from a trichology perspective.

Summer combines several factors that can leave the hair fibre drier, more porous and less manageable. Understanding them is the first step to caring for it properly:

• UV rays weaken the outer layer of the hair fibre (the cuticle), making hair look duller and feel rougher. They can also fade hair colour, particularly in colour-treated hair.
• Sea salt draws moisture out of the fibre, leaving it dry, stiff and tangled.
• Chlorinated pool water can disrupt the hair’s natural balance and, on colour-treated hair, alter the tone over time.
• Heat and dry air add to dehydration, while extra sweating and frequent washing can stress the scalp.
• Wind, sand and friction contribute to mechanical damage like frizz and split ends.

Together these factors do not “burn” the hair the way the sun affects the skin, but they do leave the fibre weaker and the scalp more reactive. A good summer routine is mostly about prevention and rehydration.

Before reaching for products, a few habits go a long way:

• Wet your hair with clean water before swimming. Saturated hair absorbs less salt and chlorine.
• Rinse hair well after the beach or the pool, ideally as soon as you can.
• Protect your hair from direct sun with a hat or scarf during the strongest hours.
• Limit hot tools in summer — your hair is already taking heat from the environment.
• Brush gently when wet, with a wide-tooth comb, to reduce breakage and frizz.

For hair that is regularly exposed to sun, sea or pool, a focused cosmetic routine helps the fibre stay hydrated and resilient. Our Bio-Repair Moisture & Fiber Restructuring range is designed specifically for this: supporting the look and feel of hydrated, smoother and more resilient hair after environmental stress.

Two products from the line are particularly useful during the summer months:

Combine the habits above with a routine that supports the fibre:

1. Cleanse gently with a moisturising shampoo from the Bio-Repair line.
2. Condition every wash with Triple Action Conditioner Deep Repair+, focusing on the lengths and ends.
3. Use a deep treatment once a week — Keratin DNA Therapy+ or a moisturising mask — to replenish hydration and fibre resilience.
4. Be consistent. A steady routine matters more than punctual fixes, especially during summer.

Most summer hair issues — dryness, dullness, frizz, frizzy ends — respond well to a consistent cosmetic routine. But if you notice persistent scalp discomfort, sudden increased shedding (which often becomes visible in autumn) or any change that does not settle, it is worth getting it assessed by a professional. Our free online Hair Clinic is a good place to start.

If you are not sure which products fit your specific concern, our free online Hair Clinic lets you share a few details about your hair and scalp, and a trichology specialist will review your case personally and send you a personalised assessment with recommendations by email — at no cost and with no obligation to buy.

Get your free hair assessment →