The Blue Lagoon will not ruin your hair, but its silica-rich water can leave it stiff for days. Here is why it happens, how to protect your hair and what to wear for your visit.
You float in the milky blue water for an hour, steam drifting past, a silica mask drying on your face. It is everything the photos promised. Then you get back to your hotel, run a brush through your hair, and it feels like straw. Welcome to Blue Lagoon hair, the souvenir nobody puts on their packing list.
Here is the short answer. The Blue Lagoon will not permanently damage your hair, but the silica and minerals in the water can leave it stiff, dry and tangled for a few days. The fix is simple: soak your hair with conditioner before you get in, keep it out of the water as much as you can, and wash it well afterward.
Does the Blue Lagoon ruin your hair?
No, the Blue Lagoon does not ruin your hair, but it can make it feel terrible for a while. The lagoon's own support team says on its hair conditioner advice page that the geothermal seawater has high levels of silica, which is not harmful to hair but can make it stiff and hard to manage.
How much it affects you depends on your hair type and how much of it goes into the water. Fine, dry, curly or color-treated hair usually feels the effect most. Many visitors who protect their hair properly report little or no problem, while those who dunk their heads without conditioner often say their hair stayed rough for several washes.
Why does the Blue Lagoon damage your hair?
The water in the Blue Lagoon is geothermal seawater, drawn from deep underground near the Svartsengi power plant on the Reykjanes Peninsula. On its way up, it picks up minerals, and it is especially rich in silica, the white substance that gives the lagoon its milky color and coats the rocks around the edges.
When that silica dries on your hair, it leaves a fine mineral coating on each strand. That coating makes hair feel rough and stiff, causes knots and can make it look dull. Algae and salt in the water add to the effect, especially on hair that is already dry or porous.
Is it permanent?
No. The effect is temporary, and it usually fades after a few washes with shampoo and conditioner. Hair that is very dry, bleached or chemically treated may take longer to feel normal again, so it is worth taking extra care if your hair falls into those categories.
How to protect your hair at the Blue Lagoon
Protecting your hair takes about five minutes and makes a big difference. Follow these steps in the changing room and shower area before you head out into the lagoon.
1. Wet your hair first
Hair that is already soaked with fresh water absorbs less of the mineral-rich lagoon water. Wet your hair thoroughly in the shower before you do anything else. Showering is required anyway before you enter any pool or lagoon in Iceland.
2. Apply plenty of conditioner
Work a generous amount of conditioner through your hair, from the roots to the ends, and leave it in. Do not rinse it out. The Blue Lagoon provides free conditioner in the shower area, but if you have a favorite leave-in conditioner or hair mask, bring it along.
The conditioner acts as a barrier, so the silica sticks to the product instead of your hair. Thick, creamy conditioners work best, and some visitors use a little hair oil on the ends as well.
3. Tie your hair up
Put long hair into a high bun or ponytail and secure it well. The aim is to keep as much hair as possible above the water. A bun on top of your head is better than a low ponytail, which tends to trail in the water.
4. Keep your head above the water
This is the most important step. Resist the temptation to dunk your head or swim with your face in the water. If you want a photo of yourself lying back in the lagoon, accept that the ends of your hair will get wet, and plan to give them extra care afterward.
5. Consider a swim cap or headband
If you have very dry, curly or color-treated hair, a swim cap offers the most protection, although few people wear one. A soft headband or scarf can help keep shorter hair and flyaways out of the water.
What to do after the Blue Lagoon
Your work is not over when you leave the water. A good aftercare routine gets your hair back to normal far more quickly.
Rinse and wash right away
As soon as you are done, shower thoroughly and wash your hair with shampoo, then condition it again. The Blue Lagoon provides shampoo and conditioner in the showers. Rinse well, since leftover silica keeps drying on your hair if you leave it.
Use a clarifying shampoo and deep conditioner
Hair specialists often recommend a clarifying shampoo in the days after a visit to remove mineral buildup, followed by a deep conditioning mask. A hair stylist quoted by Refinery29 suggested several clarifying washes followed by a moisturizing treatment for hair that has been exposed to the lagoon.
If your hair is dyed, check that the clarifying shampoo is color-safe, as some can strip color.
Be gentle
Hair is most fragile when it is wet and tangled, so use a wide-tooth comb and work from the ends upward. Avoid heat styling for a day or two if you can, and use a leave-in conditioner to make detangling easier.
Does the Blue Lagoon affect color-treated hair?
It can. Bleached, highlighted or color-treated hair is more porous, which means it absorbs more of the minerals in the water. Blonde and lightened hair may also look duller after a visit. The protection steps above are especially important if your hair is colored, and a swim cap is worth considering.
The effect is still temporary, but it may take more washes for dry, colored hair to feel normal again. A deep conditioning mask in the days after your visit helps restore moisture.
Will the Blue Lagoon damage my skin or jewelry?
For most people, the lagoon's water is gentle on skin, and many visitors find their skin feels soft afterward. The silica mud mask offered at the lagoon is popular, and the in-water bar serves masks as part of most packages. People with sensitive skin or skin conditions should rinse well afterward and moisturize.
Jewelry is a different story. Geothermal water and minerals can tarnish or discolor some metals, especially silver, so it is safest to take off rings, necklaces and earrings and leave them in your locker.
What to wear to the Blue Lagoon
You only need a few things for a visit, and the lagoon supplies the rest depending on your package.
A swimsuit, which is required in the lagoon
Flip-flops or sandals if you want them for the walk from the changing room, although most people go barefoot
A hair tie or clip to keep your hair up
Your own leave-in conditioner if you prefer a particular product
A warm hat in winter, as your head will be cold even when your body is warm
Towels are included in standard packages, and higher-tier packages include a bathrobe and slippers. You can wear a bathrobe out to the edge of the lagoon and leave it on the hooks before you step in. In winter, the short walk from the building to the water is cold, so move quickly.
Showering and etiquette at the Blue Lagoon
Iceland has strict hygiene rules for pools and lagoons, and the Blue Lagoon is no exception. Everyone must shower without a swimsuit before entering the water, which helps keep the lagoon clean without heavy chemical treatment. The Blue Lagoon has some private shower cubicles for those who prefer more privacy.
The lagoon's visitor guidelines explain the rules on showering, wristbands and conduct. Your wristband works as a locker key and lets you buy drinks from the in-water bar, so you do not need to carry cash or cards in the water.
How long should you spend at the Blue Lagoon?
Most visitors spend about two to three hours at the Blue Lagoon, including time in the changing rooms, the water and the café or restaurant. That is long enough to relax, enjoy a drink and a mask, and avoid overheating.
If you are short on time, an hour and a half in the water is plenty. Many people visit on their way to or from Keflavík Airport, since the lagoon is about 20 minutes from the airport. A Blue Lagoon round-trip transfer from Reykjavík is timed to your entry slot, so you do not need a car.
Is the Blue Lagoon worth it?
The Blue Lagoon is one of Iceland's most famous attractions, and for many visitors, the setting alone is worth it: milky blue water in a black lava field, with steam rising all around. It is expensive, though, and it is busy at peak times, so it is not the right choice for everyone.
If you want a more local experience, Reykjavík's public pools offer geothermal hot tubs for a fraction of the price, and a neighborhood pool tour in Reykjavík shows you how Icelanders actually use them.
If you want views and a spa ritual closer to the city, a Sky Lagoon ritual evening is about 15 minutes from downtown and looks out over the ocean.
Blue Lagoon alternatives
The Blue Lagoon is not the only geothermal lagoon in Iceland. Other popular options include:
Sky Lagoon, on the coast just outside Reykjavík, with an infinity edge and a seven-step ritual
The Secret Lagoon at Flúðir, a smaller, older natural pool on the Golden Circle
Mývatn Nature Baths in North Iceland, often quieter, with views over a volcanic landscape
Vök Baths in East Iceland, with pools floating on a lake
Forest Lagoon near Akureyri, set among trees above the fjord
The Secret Lagoon is easy to add to a day on the Golden Circle, and the Golden Circle with the Secret Lagoon combines Þingvellir, Geysir and Gullfoss with a soak in the old geothermal pool.
Some of these lagoons also have mineral-rich water, so the same hair care tips apply wherever you soak.
Visiting the Blue Lagoon with kids
Children are welcome at the Blue Lagoon, but there are rules. According to ticket providers, children must be at least 2 years old to enter the water, and children aged 2 to 8 must wear the free inflatable armbands. Adults also need to supervise children closely, because the water is opaque and gets deeper in places.
The same hair care steps work for kids. Wet their hair, apply conditioner, tie it up and try to keep their heads out of the water.
Check before you go
The Blue Lagoon sits on the Reykjanes Peninsula, where repeated volcanic eruptions since 2023 have led to several temporary closures. Before your visit, check the Blue Lagoon website for the latest opening status, as well as current hours, especially around holidays.
Frequently asked questions
Can you put your hair in the Blue Lagoon?
You can, but it is best to avoid it. The silica in the water can leave hair stiff, dry and tangled for a few days. If your hair does get wet, make sure you applied conditioner beforehand and wash it thoroughly afterward.
How long does Blue Lagoon hair damage last?
For most people, the effect fades after a few washes with shampoo and conditioner, usually within a few days. Very dry, bleached or color-treated hair may take longer, so use a deep conditioning mask in the days after your visit.
Does the Blue Lagoon provide conditioner?
Yes. The Blue Lagoon provides free conditioner, along with shampoo and body wash, in the shower areas of the changing rooms. Apply the conditioner before you enter the water and leave it in while you bathe.
What should I wear to the Blue Lagoon?
Wear a swimsuit and bring a hair tie. Towels are included in standard packages, and robes and slippers come with higher-tier packages. In winter, a warm hat helps keep your head comfortable while you soak.
Is the Blue Lagoon bad for color-treated hair?
It can be harder on color-treated or bleached hair, which absorbs more minerals. The effect is temporary, but take extra care: use plenty of conditioner, keep your hair out of the water and use a color-safe clarifying shampoo afterward.
Should I shower before the Blue Lagoon?
Yes. Everyone must shower without a swimsuit before entering the lagoon, as at all pools in Iceland. It keeps the water clean and is a firm rule.
Plan your Blue Lagoon visit
With a little preparation, you can enjoy the Blue Lagoon without worrying about your hair. Condition it, tie it up, keep it above the water and wash it well afterward. The easiest way to fit the lagoon into a busy trip is to combine it with another highlight, and a Golden Circle and Blue Lagoon day pairs Iceland's most famous loop with an afternoon soak.
