I learned how harsh summer is on hair the hard way, on a trip to the coast where I swam in the sea every single morning for ten days. It was blissful, right up until I got home, ran a comb through my hair, and felt it crunch. The salt and sun had left it so dry and tangled that I lost a worrying amount in the shower trying to detangle it. That holiday is exactly why I now have a protection routine I follow at every pool and beach, and my hair survives the whole season intact.
The good news I want you to hear is that you don’t have to choose between enjoying the water and keeping your hair healthy. A few minutes of prep before you swim and a little care afterward genuinely changes everything. Here’s why the sun, chlorine, and salt do so much damage, and the exact steps I take to defend against all three.
What Sun, Chlorine, and Salt Actually Do to Hair
Knowing what I was up against made me take the prep seriously, so let me explain what each one does. The sun’s UV rays break down keratin, the protein that gives your hair its strength, and they bleach out both natural and colored hair while drying the cuticle until it’s brittle and dull. Chlorine strips your hair’s natural oils and can bind to lighter or color-treated strands to leave that infamous green tint, weakening the hair the more you swim. Salt water, for all the ocean’s beauty, is intensely drying — it pulls moisture out of each strand and leaves your hair rough, knotted, and quick to snap.
The thread connecting all three is moisture loss and a damaged protective barrier. So everything I do comes down to two goals: build a barrier on the hair before I get in, and pour moisture back afterward. That’s the whole strategy, and the steps below are just how I put it into practice.
Before You Get In: My Pre-Swim Routine
1. Soak Your Hair With Clean Water First
This is the single habit that saved my hair, and it costs nothing. Dry hair acts like a dry sponge and absorbs whatever it meets first, so if you dive into a chlorinated pool with thirsty strands, they drink in the chlorine. I always head to the poolside shower or beach tap and soak my hair right through with fresh water before I go anywhere near the water. Full of clean water, my hair simply can’t take in nearly as much of the chlorine or salt — and on my seaside trips since, that one step has made the difference between soft hair and straw.
2. Seal It With Oil or Leave-In
Once my hair is wet, I smooth a layer of leave-in conditioner or a natural oil through it — coconut and argan are my go-tos because they coat without feeling heavy. This builds a slippery barrier between my strands and the water, so the cuticle stays sealed and the chemicals and salt have a much harder time getting in. I focus most of it on my ends, which are the oldest, driest, and most fragile part of my hair and the first to show damage.
3. Add UV Protection
Your hair needs sun protection just as your skin does, something I ignored for years to my regret. On bright days I either use a leave-in with UV filters or, more often, just throw on a hat or wrap a scarf around my hair. For long pool sessions a swim cap is the gold standard — it isn’t the most glamorous look, but it keeps chlorine and sun off entirely, and my color holds far better when I bother to wear one.
4. Tie It Up Loosely
The last thing I do before getting in is gather my hair into a loose braid or bun. It cuts down the surface area exposed to the sun, salt, and chlorine, and it stops my hair tangling into the kind of knots that cause breakage when I detangle later. I keep it relaxed, though — a tight, scraped-back style stresses the strands and the hairline, which defeats the point. A soft braid is gentle and does the job.
After Swimming: My Damage-Control Steps
5. Rinse the Moment You’re Out
I never let chlorine or salt sit and dry in my hair anymore, because that’s when the real damage sets in. As soon as I’m out of the water I rinse thoroughly with fresh water to flush out as much as I can. On beach days when there’s no shower nearby, I keep a bottle of water in my bag specifically for a quick rinse — it’s a small thing that pays off by the time I get home.
6. Use a Clarifying or Chelating Wash Now and Then
When I’m swimming regularly, chlorine and minerals build up no matter how careful I am, and my hair starts to look dull and feel coated. About once a week I reach for a gentle clarifying or chelating shampoo, which lifts that residue and keeps the green tint away. The one caution I’d give is not to overdo it — these are deliberately stripping, so I always follow with a rich conditioner to put the moisture straight back.
7. Deep Condition Every Week
This is my hair’s reward for braving the elements, and it’s the step that keeps everything else from catching up with me. Once a week I work a deep-conditioning mask through my lengths and leave it on for a good ten or fifteen minutes. I look for shea butter, argan oil, keratin, or hyaluronic acid on the label, and after a summer of swimming this weekly hit of moisture is what keeps my ends from going brittle.
The Everyday Habits That Hold It Together
Beyond pool and beach days, a handful of daily habits keep my hair resilient enough to take the summer in stride. These are the small things I’ve folded into my routine that make the bigger protection steps work harder.
- Wash less often: I keep it to two or three times a week so I’m not stripping the oils that protect my strands.
- Keep the water lukewarm: hot water dries hair out, so I finish with a cool rinse to seal in shine.
- Give the hot tools a rest: summer is when I lean into my natural texture and reach for heat protectant on the rare days I style.
- Detangle from the ends up: a wide-tooth comb and a gentle hand spare me a lot of breakage, especially on wet hair.
- Eat for your hair: plenty of water, healthy fats, and protein support strong strands from the inside.
- Book a trim: snipping dry, split ends before they travel up the shaft keeps the rest of my hair healthier.
My Quick Beach-and-Pool Checklist
When it all comes together, this is the simple rhythm I run through for every day near the water:
- Before: soak hair with clean water, smooth on oil or leave-in, add UV protection, tie it up loosely.
- After: rinse straight away with fresh water, and clarify weekly if you’re swimming often.
- Weekly: deep-condition to pour the moisture back.
Enjoy the Water, Keep Your Hair
That crunchy, over-salted hair I brought home from the coast taught me a lesson I’m glad I learned, because now I swim as much as I like and my hair stays soft through it all. None of this is complicated or expensive — it’s a few minutes of prep and a weekly mask, and it’s the difference between dreading the comb in September and not giving it a second thought.
Try the clean-water-and-oil trick on your very next pool or beach day; it’s the one I’d start with every time. Build the other habits in as you go, and dive into the rest of your summer knowing your hair is looked after.