Chlorine and Your Skin Barrier: What Pool Time Is Actually Doing to Your Face

Quick answer: Chlorine strips the skin's natural lipid barrier along with pool bacteria, which is why skin can feel tight, dry, or reactive after swimming. Rinsing off before and after a swim and applying a protective moisturiser beforehand limits how much chlorine your skin barrier is exposed to.

Does chlorine dry out your skin?

Chlorine can be drying because it disrupts the skin's natural lipid barrier, the layer of oils and fats on the skin's surface that helps retain moisture and keep out irritants. When this barrier is disrupted, water can escape more easily from the skin, which is part of why skin often feels tight or dry after time in a chlorinated pool, even on a warm day when you'd expect skin to feel fine.

Repeated or prolonged exposure, such as daily pool sessions during a staycation week, can compound this effect, particularly for people who already have a tendency toward dryness or a more sensitive skin barrier. Chlorine can also interact with existing skincare actives, so it's worth being mindful about layering strong exfoliating acids or retinoids on days involving significant pool time, since a compromised barrier is more prone to irritation from active ingredients. The drying effect isn't unique to the face, but facial skin is often thinner and more exposed than skin elsewhere on the body, so it can show the effects more visibly. Supporting the barrier with rich, restorative formulas after swimming helps counter this. Our barrier repair collection is built around exactly this kind of restorative, protective skincare, and pairs well with the hyaluronic acid edit for replenishing lost moisture.

How do I protect my skin before swimming?

A short pre-swim routine can meaningfully reduce how much chlorine your skin absorbs:

• Rinse with clean water before getting in the pool — already-damp skin absorbs less chlorinated water than dry skin
• Apply a layer of a rich, occlusive moisturiser or balm beforehand as a light protective barrier
• Avoid strong active ingredients, such as retinoids or high-strength acids, in the hours directly before swimming
• Apply SPF generously, which doubles as sun protection and a light physical barrier

None of this makes skin fully chlorine-proof, but it does reduce the degree of barrier disruption over a swim session, which matters more the more frequently you're in the water. Our barrier repair range and SPF and sunscreen collection are both useful for building a simple pre-pool routine.

Should I moisturise before or after the pool?

Both, ideally, though the products and goals differ slightly. Before swimming, the aim is more about creating a light protective layer and ensuring skin isn't already dry or compromised going in, so a richer balm or barrier-supporting cream works well. After swimming, the priority shifts to rinsing off chlorine thoroughly with clean water, then replenishing moisture that the pool session has likely stripped, using a hydrating and barrier-repairing formula.

Applying moisturiser to slightly damp skin after rinsing can help lock in extra hydration, since it traps some of that surface moisture rather than sealing dry skin on its own. If your skin feels particularly tight, red, or irritated after regular pool sessions, that's a sign the barrier needs more consistent support, and it may be worth simplifying the rest of your routine around pool days rather than adding further active ingredients. For skin that's persistently irritated beyond typical post-swim dryness, the British Association of Dermatologists' patient information is a reliable resource, and our barrier repair and hyaluronic acid collections can help rebuild comfort between swims.

A few small adjustments either side of the pool can make a real difference to how your skin feels through a staycation or regular swimming routine. Explore our barrier repair collection for pool-friendly essentials, or book a consultation if your skin needs more tailored support.

Educational content only — not medical advice. Skin that stays red, sore, or irritated well after swimming is worth having looked at by a professional.

Dr. Tanveer Ahmed
MBBS/FCPS · Founder & Clinical Director, Celsia Skin View profile