The best way to prevent dry skin after swimming is to create a barrier before you get in the pool, rinse immediately after you get out, and moisturize within three minutes of drying off. Chlorine is an oxidizing agent that breaks down the natural oils on your skin, leaving it stripped of its protective layer and prone to moisture loss. With a few simple steps before, during, and after your swim, you can keep your skin hydrated all season.
Why Pool Water Dries Out Your Skin
Your skin naturally produces an oily substance called sebum that acts as a moisture seal and a shield against irritants. Chlorine dissolves that oil. It’s designed to destroy organic matter like bacteria and viruses, but it doesn’t distinguish between a pathogen and the lipids and proteins that make up your skin’s protective barrier. Once that barrier is compromised, water evaporates from your skin much faster than usual, and irritants can penetrate more easily.
Repeated exposure compounds the problem. If you swim several times a week without protecting your skin, you can develop chronic dryness, flaking, and itching. The oxidative stress from chlorine also accelerates skin aging over time. This is why competitive swimmers and frequent recreational swimmers tend to struggle with skin issues more than occasional pool-goers.
What to Do Before You Swim
Applying a layer of moisturizer or barrier cream before entering the pool is one of the most effective preventive steps. The goal is to create a hydrophobic (water-repelling) layer between your skin and the chlorinated water. Look for products containing petrolatum or dimethicone, both of which are classified as skin protectants. Petrolatum in particular forms a thick, occlusive seal that slows chlorine’s ability to strip your natural oils.
A thick, ointment-based moisturizer works better than a lightweight lotion for this purpose. Apply it generously to areas that tend to dry out most: arms, legs, chest, and anywhere your skin feels tight after a typical swim. If you have sensitive skin, an ointment-style emollient is preferable over products with fragrances or active ingredients that could react with chlorine.
Rinsing your skin with fresh water before getting in the pool also helps. Dry skin absorbs chlorinated water more readily than skin that’s already saturated with clean water. A quick pre-swim shower fills your skin with non-chlorinated moisture, reducing how much pool water it soaks up.
What to Do Immediately After Swimming
Shower as soon as you get out of the pool. Soap and water go a long way toward removing residual chlorine, but timing matters. The longer chlorine sits on your skin, the more damage it does. Don’t linger poolside while your skin air-dries in the sun. Rinse with warm (not hot) fresh water, and make sure the shower you’re using isn’t recycling chlorinated pool water, which some pool facilities do.
Pat your skin dry with a towel rather than rubbing. Rubbing creates friction on skin that’s already been chemically stressed, which can worsen irritation and flaking.
The Three-Minute Moisturizing Window
Dermatologists at Mayo Clinic recommend applying moisturizer within three minutes of getting out of the shower. Your skin is still slightly damp during this window, and a good moisturizer traps that residual water against your skin before it evaporates. Waiting longer means you lose that hydration opportunity, and your skin ends up drier than if you’d skipped the shower entirely.
For post-swim moisturizing, choose products with ceramides. These lipids make up roughly 50% of your skin’s natural moisture barrier, and topical ceramides help restore what chlorine stripped away. A formula that pairs ceramides with cholesterol or a low concentration of urea (5% or less) provides both barrier repair and hydration. At higher concentrations, urea acts as an exfoliant, which is the opposite of what chlorine-stressed skin needs.
The Vitamin C Neutralization Trick
Vitamin C (ascorbic acid) chemically neutralizes chlorine on contact. You can make a simple spray by dissolving one teaspoon of ascorbic acid or sodium ascorbate in a cup of distilled water. Spray it over your skin after you exit the pool, rub it in, and then shower and moisturize as usual. This extra step deactivates residual chlorine before it can do further damage during your rinse-off routine. U.S. Masters Swimming recommends this approach, and many competitive swimmers keep a spray bottle in their pool bag.
Saltwater Pools Are Not a Free Pass
Saltwater pools use a chlorine generator that converts salt into chlorine, so your skin is still exposed to the same oxidizing chemical. The chlorine levels tend to be slightly lower than in traditionally chlorinated pools, which some people find less irritating. But salt itself pulls moisture from your skin, leaving it tight and dry. Both chlorine and salt strip natural oils, so the prevention steps are the same regardless of pool type.
If chlorinated pools consistently irritate your skin despite taking precautions, swimming in fresh water (lakes or rivers) or the ocean may be worth trying. Ocean water contains magnesium, calcium, and potassium that can actually benefit some skin types in moderation. But salt water of any kind still has a drying effect, especially on sensitive skin, so rinsing and moisturizing afterward still apply.
Extra Precautions for Eczema-Prone Skin
Swimming with eczema is possible, but it requires more deliberate preparation. The National Eczema Society recommends applying an emollient (preferably an ointment, which is thicker than a cream) liberally before entering the pool. After swimming, shower with an emollient wash rather than regular soap, pat dry, and reapply both your emollient and any prescribed topical treatments.
A few situations call for skipping the pool entirely. If your eczema is severely flaring, chlorine can worsen barrier dysfunction significantly. If your skin is infected, with weeping or crusting, dermatology guidelines recommend waiting until at least 24 hours after starting treatment and until the crusting has resolved. This protects both your skin and other swimmers.
Pool sensitivity varies from facility to facility. Chlorine levels fluctuate based on when chemicals were last added, so if one pool bothers your skin, try another or swim at a different time of day. A short test swim at a new pool lets you gauge your skin’s reaction before committing to a full session. Some families also find that UV-protective swimwear reduces the total skin area exposed to chlorine, which can make a meaningful difference for children who are self-conscious about visible eczema.
Building a Swim-Day Routine
The full sequence looks like this: rinse with fresh water before swimming, apply a barrier product to exposed skin, swim, spray with vitamin C solution if you have it, shower with gentle soap within minutes of exiting the pool, pat dry, and apply a ceramide-rich moisturizer before the three-minute window closes. It sounds like a lot of steps, but once it becomes habit, the whole post-swim process takes about five minutes.
For frequent swimmers, keeping a dedicated pool bag stocked with your spray bottle, a gentle cleanser, and your moisturizer eliminates the temptation to skip steps. The difference between occasional dryness and chronic, itchy, flaking skin often comes down to consistency rather than any single product.