Why Does Blonde Hair Go Brassy in Summer? Causes, Prevention and Expert Tips
If you’ve ever noticed your beautiful blonde hair turning yellow, orange, or dull during the summer months, you’re not alone. Many blondes find that their hair colour changes after spending time in the sun, swimming pool, or sea.
But why does blonde hair go brassy in summer, and more importantly, what can you do about it?
At Lifestyle Salons, we’re often asked this question by clients who want to keep their blonde looking fresh, bright, and salon-perfect all season long. Here’s everything you need to know.
What Does “Brassy” Hair Mean?
Brassy hair refers to unwanted warm tones that appear in blonde, highlighted, balayage, or grey hair. These tones typically show up as:
- Yellow hues
- Orange tones
- Gold or copper shades
- Dull, faded colour
While some people love warmer blondes, brassiness is usually unwanted when you’re aiming for cool, ash, platinum, beige, or icy blonde shades.
Why Does Blonde Hair Go Brassy in Summer?
1. Sun Exposure
Just as UV rays can damage your skin, they can also affect your hair colour.
Prolonged exposure to sunlight breaks down colour pigments and can cause toners to fade more quickly. As cooler tones fade, the warmer underlying pigments become more visible, creating that brassy appearance.
2. Chlorine from Swimming Pools
Chlorine is one of the biggest culprits behind summer brassiness.
Swimming pools contain chemicals that can strip moisture from the hair and alter colour-treated hair. Over time, chlorine can leave blonde hair looking dull, dry, and discoloured.
3. Salt Water
While a day at the beach can be wonderful for the soul, salt water can be tough on your hair.
Salt draws moisture from the hair shaft, leaving hair dry and porous. The more porous your hair becomes, the more susceptible it is to colour fading and brassiness.
4. Hard Water and Minerals
Many areas have hard water containing minerals such as iron, copper, and calcium.
These minerals can build up on the hair and contribute to unwanted warm tones, particularly in lighter hair colours.
5. Heat Styling
Summer often means more styling, holidays, events, and special occasions.
Frequent use of hair dryers, straighteners, and curling irons can weaken the hair cuticle, causing colour to fade more rapidly and increasing the risk of brassiness.
How to Prevent Blonde Hair Going Brassy
Use Colour-Protecting Products
Choose shampoos and conditioners specifically designed for colour-treated hair.
These products help protect the hair cuticle and slow down colour fading.
Wear a Hat in Strong Sunlight
A stylish hat doesn’t just look great; it also provides valuable protection from UV rays.
Protecting your hair from direct sunlight can help preserve your colour for longer.
Wet Your Hair Before Swimming
Before entering a swimming pool, rinse your hair with fresh water.
Hair acts like a sponge. If it’s already saturated with clean water, it will absorb less chlorinated water.
Rinse Immediately After Swimming
After swimming, rinse your hair thoroughly with fresh water as soon as possible to remove chlorine and salt residue.
Deep Condition Regularly
Hydrated hair holds colour better.
A professional conditioning treatment can help maintain moisture levels and improve the overall health and appearance of your hair.
Can Purple Shampoo Help?
Yes, purple shampoo can be an excellent tool for combating brassiness.
Purple sits opposite yellow on the colour wheel, helping to neutralise unwanted yellow tones and keep blonde hair looking brighter.
However, it’s important not to overuse purple shampoo, as excessive use can leave the hair looking dull or slightly violet.
If you’re unsure which products are best for your hair type and colour, your stylist can recommend the most suitable option.
When Should You Book a Toner Refresh?
Even with the best home care, most blondes benefit from occasional toner refresh appointments.
A toner can:
- Neutralise unwanted warmth
- Restore brightness
- Enhance shine
- Refresh your blonde between colour appointments
For many clients, a toner refresh every 6–8 weeks helps maintain their ideal blonde shade throughout the summer.
Keep Your Blonde Looking Beautiful This Summer
Summer should be about enjoying holidays, sunshine, and making memories—not worrying about brassy hair.
With the right care routine and professional advice, you can keep your blonde looking bright, fresh, and healthy all season long.
If you’re concerned about brassiness, colour fading, or keeping your blonde in perfect condition this summer, our experienced team at Lifestyle Salons would be delighted to help.
Book a consultation with one of our colour specialists and let us help you achieve your most beautiful blonde yet.
