August 03, 2026

Frizzy Hair in Summer? Here's How to Stop Humidity Ruining Your Hair

Summer should be the season of effortless, glossy hair. Instead, for many of us, it's the season of puffiness, flyaways, swelling, and styles that unravel the second we step outside.

According to Color Wow Chief Chemist Dr. Joe Cincotta, summer frizz isn't simply a styling problem, it's a moisture-management problem.

And once you understand what's actually happening to your hair, it's much easier to stop frizz.

Why Does Hair Get Frizzy in Summer?

To understand summer frizz, you first need to understand how hair reacts to moisture. Every strand is covered by an outer layer called the cuticle.

When the cuticle is smooth and flat, hair looks:

Glossy
Sleek
Polished
Frizz-free

But when moisture from the environment penetrates the hair shaft, things change.

"The hair fibre swells unevenly as it absorbs atmospheric moisture," explains Dr. Joe.

"That swelling disrupts the shape of the hair and causes strands to behave independently, creating what we recognise as frizz."

In simple terms:

1

Humidity gets in.
2

Hair expands.
3

Styles lose their shape.
4

Frizz appears.

What's happening beneath the surface is that water molecules interfere with the temporary hydrogen bonds that help hold your style in place.

As humidity enters the hair shaft, those bonds break and reform in new positions, allowing hair to revert toward its natural texture pattern.

This is one reason humidity can undo even a freshly styled blowout.

Why Does Hair Feel More Frizzy in Summer than Winter?

Summer creates the perfect storm for frizz because several triggers are happening at the same time.

1. High Humidity

Humidity is the number one culprit behind summer frizz.

The more moisture in the air, the more opportunity hair has to absorb it.

This is especially problematic if your hair is:

Colour-treated
Bleached
Heat-damaged
Naturally curly
Highly porous

It's also worth paying attention to dew point, not just humidity. While humidity measures how saturated the air is relative to temperature, dew point measures the actual amount of moisture in the air.

Because of this, it's often a more reliable predictor of how your hair will behave.

2. Heat and Sweat

Hot weather means increased perspiration around the scalp and hairline.

That moisture can reactivate styles, disturb smooth cuticles, and create halo frizz throughout the day.

3. UV Exposure

Most people think about protecting their skin from UV rays, but few think about protecting their hair.

But prolonged sun exposure can contribute to dehydration, roughened cuticles, and increased susceptibility to frizz.

4. Swimming

Pool water, salt water, minerals, and environmental pollutants can all leave the hair surface rougher and more vulnerable to humidity.

That's why many people find their hair becomes progressively frizzier as summer goes on.

How to Control Frizzy Hair in Summer

The best way to fight frizz isn't to smooth it after it appears; it's to make hair less vulnerable to frizz in the first place.

1. Be Gentle With Wet Hair

Frizz often starts before you even begin styling.

Aggressively rubbing hair with a towel can rough up the cuticle and create friction that encourages puffiness and flyaways later.

Instead, gently squeeze excess water from your hair and blot with a microfiber towel or soft cotton T-shirt.

2. Prioritise Hydration

One of the biggest misconceptions about frizz is that it's caused by too much moisture.

In reality, dehydrated hair is often more susceptible to frizz because it readily absorbs moisture from the atmosphere.

This is why keeping hair hydrated with lightweight, residue-free formulas like Money Laundering Shampoo and Conditioner can help improve manageability and reduce puffiness in humid weather.

3. Turn Down the Heat

Heat damage can weaken and roughen the cuticle over time.

The more damaged and porous the cuticle becomes, the easier it is for humidity to penetrate the strand.
If you regularly use hot tools, avoid unnecessarily high temperatures and always use products that provide heat protection.

4. Stop Touching Your Hair

One of the most common causes of midday frizz is over-handling.

Running your hands through your hair, fluffing your roots, or repeatedly brushing can create friction and disrupt the cuticle.

The less you touch your style, the longer it tends to stay smooth.

5. Protect Hair From Summer Stressors

UV rays, chlorine, salt water, and pollution can all leave hair more vulnerable to frizz.

Wearing a hat during prolonged sun exposure and rinsing hair after swimming can help minimise some of that damage.

Why Good Hair Habits Aren't Always Enough

Even healthy, well-cared-for hair can struggle in high humidity.

Once moisture enters the hair shaft, the strand begins to swell, creating the puffiness, flyaways, and rough texture we associate with frizz.

That's why many traditional anti-frizz products only provide temporary results. Many creams, oils, and smoothing products help make hair look and feel smoother by coating the surface of the strand.

While that can be effective for managing dryness, static, and surface frizz, it doesn't necessarily stop atmospheric moisture from penetrating the hair in humid conditions.

For people whose biggest frizz trigger is summer humidity, a different approach is often needed.

Humidity-related frizz is often less of a styling problem and more of a barrier problem.

Preventing moisture from getting into the hair in the first place is usually far more effective than trying to smooth frizz after it appears.

The Best Humidity Fighters for Summer Hair

1. For Preventing Frizz Before It Starts: Dream Coat

One of the reasons Dream Coat has become such a cult favourite is that it approaches frizz differently.

Rather than relying on heavy oils or creams, Dream Coat uses heat-activated technology to create an invisible, lightweight humidity-resistant shield around each strand.

This helps to smooth and compress the cuticle so moisture has fewer pathways through which to enter the hair.

Once activated with tension blow-drying, it helps:

Smooth and compress the cuticle
Repel humidity
Prevent swelling
Enhance shine
Keep styles looking polished for longer

Which Dream Coat Is Right for You?

1. Dream Coat Supernatural Spray

Best for straight, wavy, or frizz-prone hair that wants smooth, glassy, humidity-resistant results.

2. Dream Coat for Curly Hair

Ideal for naturally wavy and curly textures looking for hydrated, defined curls without crunch or stiffness.

Unlike the original Dream Coat, it is designed to enhance your natural curl pattern while helping reduce frizz.

3. Extra Strength Dream Coat

Created for extremely dry, dehydrated, coarse, curly, or highly frizz-prone hair that needs extra moisture support alongside powerful humidity protection.

2. For Getting Rid of Summer Frizz Fast: One-Minute Transformation

Think of One-Minute Transformation as your emergency frizz fixer.

It's particularly useful for touching up humidity-induced frizz throughout the day without needing to completely restyle your hair.

Applied to dry hair, it instantly helps:

Smooth flyaways
Tame puffiness
Refine rough texture
Polish ends
Restore a sleek finish

Don't Forget the Shine Factor

One of the reasons frizzy hair often looks dull is because rough cuticles scatter light rather than reflecting it evenly.

That's why controlling frizz and boosting shine often go hand in hand. Part serum, part oil, Pop & Lock helps smooth the hair surface while delivering lightweight hydration within the strand.

Applied as a finishing step, it helps:

Boost shine
Smooth flyaways
Enhance colour vibrancy
Provide UV protection
Create a polished, glossy finish

Shop All Anti-Frizz Products →

Dr. Joe's Summer Frizz Game Plan

If your hair struggles every summer, keep your routine simple:

Minimise friction when hair is wet
Keep hair hydrated
Protect against UV exposure and environmental stress
Use humidity-resistant technology when styling
Touch up flyaways instead of restyling everything
Add shine to help hair look smoother and healthier

The Bottom Line

If you've been wondering why your hair gets frizzy in summer, the answer comes down to one thing: moisture.

Humidity, heat, sweat, UV exposure, and environmental stress all work together to disrupt the hair cuticle and create frizz.

While healthy hair habits can make a significant difference, the most effective summer frizz routines combine prevention, protection, and targeted touch-ups.

Frequently Asked Questions

Why does my hair frizz even after using anti-frizz products?

Almost always one of three reasons:

The product is a smoothing agent rather than a genuine cuticle sealer (different mechanism, insufficient in high humidity)
The product was applied to dry hair after styling rather than to wet hair before styling
The hair's porosity is high enough that atmospheric moisture is penetrating even through a surface coating.

A cuticle-sealing treatment applied before styling, activated with heat, is the most reliable solution.

Does humidity affect all hair types equally?

No. High-porosity hair (which includes most colour-treated, bleached, or chemically processed hair) is significantly more vulnerable to humidity-driven frizz than low-porosity hair.

Curl pattern also affects frizz: curly and coily hair is more susceptible because sebum (the scalp's natural moisturiser) cannot travel down a curved shaft the way it does a straight one, leaving the lengths more porous by default.

What is the best product to stop frizz in humidity?

The most effective category of product for true anti-humidity performance is a heat-activated cuticle sealer applied to wet hair before blow-drying.

Dream Coat Supernatural Spray is specifically engineered for this — it is not a smoothing cream or a silicone coating, but a hydrolyzing treatment that compresses the cuticle under heat to create a genuine moisture barrier.

How long does anti-humidity protection last?

Dream Coat's protection lasts through 3–4 washes under normal conditions.

This means a Sunday application provides meaningful protection through most of the week, even with daily exposure to humidity.

Can I air-dry after applying Dream Coat?

Yes, but with reduced effectiveness.

Dream Coat's hydrolyzing technology is heat-activated — the blow-dryer is what triggers the cuticle compression and bonding that creates maximum humidity resistance.

Air-drying provides some benefit but significantly less than heat activation, particularly in high dew-point conditions.

Does straightening or flat ironing help with humidity frizz?

Temporarily. Flat ironing breaks and resets hydrogen bonds in a very straight configuration but, without a sealing barrier over the top, atmospheric moisture will begin re-breaking those bonds as soon as you step outside.

The iron sets the style; a cuticle sealer keeps it there. Both are needed in high humidity.

Why does my blowout look great inside but frizz the moment I go outside?

Because the hydrogen bonds in your hair reformed in their styled position inside but, without a cuticle seal over the top, atmospheric moisture (especially at high dew points) begins breaking and reforming them almost immediately upon outdoor exposure.

The transition from climate-controlled indoor air to outdoor summer humidity is exactly the moment a barrier product is supposed to intervene.

Is frizzy hair damaged hair?

Not necessarily. Naturally curly or high-porosity hair can be frizz-prone without being damaged.

However, damage — from chemical processing, heat, mechanical friction — does increase porosity and therefore increases frizz susceptibility.

Reducing damage over time (through gentler processing, consistent protective products, and regular mineral removal) reduces long-term frizz vulnerability.