The short answer: salt water doesn't damage your hair so much as dehydrate it. Sea water is saltier than the water held inside the strand, so it draws moisture out and leaves salt behind - which is exactly what creates that gritty beach texture. The fix is not to stay out of the ocean. It is to wet your hair with fresh water before you get in, rinse it soon after you get out, and put something back once a week.
On the Northern Rivers coast, summer means the beach several times a week from October through to March. Hair that behaved perfectly in winter starts feeling rough by January, and the usual response - washing it more, brushing it harder - makes it worse. Here is what salt water is actually doing, and the routine that works around it.
What salt water does to hair
Hair is porous. Water moves in and out of the strand depending on what is around it, and it moves from wherever there is more water to wherever there is less.
Sea water carries roughly 35 grams of salt per litre. That makes it saltier than the water inside your hair, so the gradient runs outwards: moisture leaves the strand, and salt crystals are left behind on the surface as it dries. That is the tightness you feel walking back up the beach, and it is also where the texture comes from.
At the same time, the outer layer of the hair - the cuticle, which lies like overlapping roof tiles when hair is in good condition - roughens and lifts. A lifted cuticle catches on its neighbours, which you feel as tangles, and scatters light instead of reflecting it, which you see as a loss of shine.
Add a full day of sun and a sandy towel, and hair that started the morning soft can finish the day feeling like straw. None of that is permanent damage from a single swim. It becomes a problem when it repeats all summer with nothing in between to put the moisture back.
Who feels it most
Salt water is harder on some hair than others, and it is worth knowing where you sit before you change anything.
- Colour-treated and bleached hair. The cuticle has already been lifted by the colouring process, so both moisture and pigment leave more easily. Salt water can make colour fade noticeably faster over a summer.
- Curly, coily and coarse hair. Naturally drier to begin with, because scalp oils travel down a spiral more slowly than a straight shaft. There is a fuller routine for this in our guide to curly and wavy hair through an Australian summer.
- Fine hair. Less affected by the moisture loss, more affected by the tangling - fine strands snap more easily once the cuticle roughens.
- Grey and greying hair. Often coarser and drier in texture, and it shows dullness more readily than pigmented hair.
Before you swim
Hair behaves a lot like a sponge, and a sponge that is already full cannot take on much more. That is the whole principle behind the pre-swim routine.
1. Wet your hair with fresh water first
Under the beach shower, or from the drink bottle in the car. Hair that is already saturated with fresh water simply has less room to absorb salt water, so less salt gets in and less moisture comes out.
It takes thirty seconds and costs nothing, and if you only take one thing from this article, take this one.
2. Add a little slip
Smooth something through the mid-lengths and ends - the oldest and driest part of your hair - so the strands sit smoothly against each other instead of roughing up in the surf.
Our Deep Nourishing Hair Treatment Mask works as a leave-in for this, used sparingly on wet hair. If your hair runs thick, curly, frizzy or coarse, a few drops of Kakadu Plum Scalp & Hair Oil does the same job. Either way, apply it to wet hair rather than dry - you are trying to hold the water already in the strand, not add moisture on top of a dry surface.
3. Tie it back, loosely
A loose braid or a soft twist keeps long hair from whipping into knots in the waves. Loose is the operative word: a tight elastic on wet hair is a reliable way to create breakage at the band. Fabric scrunchies and coil ties are gentler than thin elastics.
4. Give your part some shade
Sun falls hardest on the parting and the crown, and the scalp there burns like skin anywhere else. A hat or a scarf is the simplest answer, and it shades your hair from hours of direct sun at the same time. Our guide to staying radiant without the damage covers the skin side of the same problem.
After the beach
Salt keeps drawing on the strand for as long as it sits there. The sooner it comes off, the less there is to undo - and this is the part of the routine most people skip.
1. Rinse before it dries
Fresh water, straight after the swim. The beach shower, the tap by the car park, a bottle over your head in the driveway. You do not need shampoo for this. You are simply moving the salt off before it sets and keeps working on the drive home.
2. Wash gently, not fiercely
Salty, sandy hair makes people want to scrub. Resist it. Work a sulphate-free shampoo into the scalp with your fingertips and let the lather rinse through the lengths on its way down - that clears salt and sand without stripping what moisture is left.
Our Extra Hydrating Natural Shampoo with Lemon Myrtle and Emu Apple suits normal to dry, thick or colour-treated hair through a beach summer. If your hair is fine and weighs down easily, the lighter Extra Gentle Natural Shampoo is a better fit.
3. Condition, and give it a minute
Conditioner does its best work with a little time. Comb our Extra Hydrating Natural Conditioner through the mid-lengths and ends with your fingers or a wide-tooth comb, leave it while you rinse the rest of the sand off, then rinse.
Detangle now, with the conditioner still in, rather than later on dry hair. This single change prevents more breakage than any product does.
4. Dry it kindly
Squeeze, never rub. A cotton T-shirt or a soft towel pressed along the lengths creates far less friction than a vigorous rub with a rough one. Then let it air dry if the day allows. Heat on top of a salt-and-sun day is asking a great deal of one head of hair.
No shower in sight?
Fresh water, then the hair treatment as a leave-in or a few drops of oil through the ends, will hold you until you get home. It will not remove the salt, but it takes the edge off the tangles and the tightness - and it means you are not dragging a brush through dry, salty hair in the meantime.
The weekly rhythm
A good beach summer is not about doing more to your hair. It is about one deeper moment each week, and a few small habits that stop the minor damage adding up.
Set aside one wash where you use a richer treatment in place of your usual conditioner, and leave it on properly - through the rest of your shower, or while you potter about before you rinse. Our Deep Nourishing Hair Treatment Mask, a Gold winner at the Clean + Conscious Awards, is the one we use for this, and there is a fuller method in how to use a natural hair mask for maximum results.
Then the small things, which matter more than they sound:
- Never brush dry, sandy hair. Sand is abrasive, and dragging it along the strand does more harm than the salt did. Rinse first, detangle with conditioner in, and work from the ends upward.
- Use a wide-tooth comb rather than a brush while hair is damp. Fewer points of contact, far less snapping.
- Rinse after the pool too. Chlorine dries hair out by a different route, and on lightened hair it can shift the tone. Same fix.
- Skip the tight beach bun on wet hair. Loose braid, soft tie, no tension at the roots.
- Rinse your hat and your towel. Salt sits in the fabric and goes straight back onto clean hair.
- Trim every six to eight weeks over the warm months. Summer shows at the ends first, and a small trim stops a split travelling up the strand.
Salt sprays, and the irony of them
It is worth naming the contradiction. Texture sprays are sold to create exactly the effect that a day in the ocean creates for free - a roughened cuticle and a bit of grit - and they work the same way, by leaving salt on the hair.
There is nothing wrong with liking that texture. Most of us do, which is why the look has a name. The thing to avoid is stacking one on the other: a summer of ocean swims plus a daily salt spray, with no conditioning in between, is where hair genuinely starts to suffer. If you love the texture, get it from the ocean and put the moisture back weekly.
My own summer
I live ten minutes from the water, and I am in it most weeks of the year. For a long time my hair spent every summer somewhere between dry and unmanageable, and I assumed that was simply the trade for living here.
What changed it was not a product. It was the fresh-water rinse before I got in, which felt pointless for about three weeks and then very obviously was not, and the habit of putting a treatment through my hair once a week instead of only when it already felt wrecked.
My hair is naturally curly, so it was never going to come out of the surf smooth, and I stopped wanting it to. Soft is the goal. Sleek was never on the table.
Frequently asked questions
Is salt water bad for your hair?
Not in itself. Salt water draws moisture out of the hair and roughens the cuticle, which is what creates beach texture. Occasional swims with a fresh-water rinse afterwards cause little trouble. Repeated exposure over a summer, with no conditioning in between, is what leaves hair rough, brittle and prone to breakage.
Should I wet my hair before swimming in the ocean?
Yes. Hair already saturated with fresh water has less capacity to absorb salt water, so less salt gets in and less moisture is drawn out. It is the single most effective step you can take, and it takes about thirty seconds.
How do I get salt out of my hair without washing it every day?
A plain fresh-water rinse removes most of the salt without any shampoo at all. Follow it with conditioner through the mid-lengths and ends. Most hair does not need a full cleanse after every swim, and washing daily through summer tends to make dryness worse rather than better.
Does salt water fade hair colour?
It can. Colour-treated and bleached hair has an already-lifted cuticle, so pigment escapes more readily. Rinsing with fresh water before and after swimming, and wearing a hat in strong sun, both slow it down.
Is chlorine or salt water worse for hair?
They cause similar dryness by different routes - salt by drawing moisture out, chlorine by stripping the hair's natural oils. Chlorine can additionally shift the tone of lightened hair. The pre-rinse and post-rinse routine helps with both.
Can I use a hair mask as a leave-in before swimming?
A small amount, yes. Our Deep Nourishing Hair Treatment Mask can be used as a leave-in on wet hair before a swim, or as a full weekly treatment that you rinse out. Use less than you would for a treatment, and keep it to the mid-lengths and ends.
How often should I use a hair treatment in summer?
Once a week is a sensible rhythm through the swimming months, and more often if your hair is colour-treated, curly, coarse or already dry.
Does hair oil protect hair from salt water?
It helps the strands sit smoothly against each other and makes detangling easier afterwards, which reduces the breakage that comes from a rough post-beach comb-out. It is not a barrier and it will not stop salt water entering the hair - the fresh-water pre-soak does far more of that work.
Where to start
If you change one thing this summer, make it the fresh-water rinse before you get in. If you change three, add a rinse straight after the swim and a proper treatment once a week.
Everything we make is formulated and produced in Australia, free of sulphates, silicones and synthetic fragrance, and packaged in refillable aluminium rather than plastic. Shop natural shampoo, conditioner and hair treatments →
This article is general information about hair care, not medical advice. If you are experiencing scalp irritation, sudden hair loss or a persistent flaking scalp, please speak with your GP or a dermatologist.
