How To Protect Your Hair In The Heat

Summer is arguably the best season — the long days, the warm nights, and the excuse to do absolutely everything outdoors. But as much as we love it, summer is genuinely one of the hardest seasons on your hair. Between relentless UV exposure, humidity, salt water, chlorine, and the heat tools we refuse to put down, our strands take a beating from June through August.

The good news? A little intentional care goes a long way. Here’s everything you need to know to protect your hair this summer without giving up a single beach day.

Why Summer Is So Hard on Your Hair

Before we get into the fixes, it helps to understand what’s actually happening to your hair in the heat.

UV rays break down the proteins in your hair shaft over time, leading to dryness, brittleness, and, if you’re color-treated, significant fading. Think of it as sunburn for your strands.

Heat and humidity disrupt the hydrogen bonds in your hair, which is what causes frizz. High humidity essentially forces moisture into the hair cuticle unevenly, causing the shaft to swell and the strand to curl or puff in all the wrong ways.

Salt water and chlorine are both drying and damaging in their own ways. Salt pulls moisture out of the hair shaft, while chlorine strips away natural oils and can even alter the structure of chemically treated or bleached hair over time.

The result of all of the above: dullness, breakage, split ends, color fade, and that straw-like texture that no amount of conditioner seems to fix. Sound familiar? Let’s change that.

Step 1: Swap Your Shampoo (At Least Some of the Time)

Summer is the season to embrace a more hydrating, sulfate-free shampoo, especially if you’re swimming regularly. Sulfates are the cleansing agents that make shampoo lather so satisfyingly, but they can be harsh and stripping, which is the last thing you need when your hair is already fighting heat and sun.

Look for shampoos with ingredients like glycerin, aloe vera, or panthenol, which help retain moisture while still cleansing effectively. And if you’re swimming several times a week, consider a chelating or clarifying shampoo once a week to remove chlorine and mineral buildup, then follow immediately with a deep conditioner.

TGR tip: You don’t have to overhaul your entire routine. Just rotating in a hydrating formula a few times a week can make a noticeable difference.

Step 2: Make Deep Conditioning Non-Negotiable

If you only do one thing differently this summer, make it this: deep condition every single week. Your hair is losing moisture constantly — to the sun, to the water, to the heat — and a rinse-out conditioner alone isn’t going to cut it.

A good deep conditioning mask (applied for at least 10–20 minutes, ideally with heat to help it penetrate) will restore softness, reduce breakage, and improve elasticity. Look for masks with ingredients like shea butter, coconut oil, argan oil, or hydrolyzed keratin.

If your hair is on the finer side and tends to get weighed down, go for a lighter, moisture-focused formula rather than a heavy protein treatment, which can cause stiffness or breakage on fine strands.

Step 3: Apply UV Protection for Your Hair — Yes, It Exists

SPF for your hair is having a well-deserved moment, and for good reason. UV filters in hair products work similarly to how sunscreen works on skin — they create a barrier that helps block UVA and UVB rays before they can break down your hair’s proteins and pigment.

You’ll find UV protection in a variety of formats: leave-in conditioners, hair mists, shine serums, and dedicated hair sunscreen sprays. For everyday use, a lightweight UV-protective hair mist is the easiest to work into your routine — just spritz it on before you head out the door.

Color-treated hair especially needs this step. UV rays are one of the primary culprits behind color fading, so if you’ve invested in highlights, a balayage, or a fresh dye job, UV protection is essential — not optional.

Step 4: Protect Before You Swim

Swimming is one of the most damaging things you can do to your hair if you go in unprepared — and one of the easiest to mitigate with a little prep.

Before you get in the water (pool or ocean), try these two tricks:

Saturate your hair with fresh water first. Hair is porous, and when it’s already full of clean water, it’s less able to absorb chlorinated or salt water. This simple step dramatically reduces damage.

Apply a leave-in conditioner or a hair oil before swimming. This creates a protective coating on the hair shaft that helps buffer against chlorine and salt. Coconut oil is a classic choice; lightweight argan oil works well for finer hair.

After swimming, rinse your hair as soon as possible and follow up with a moisturizing shampoo and conditioner.

Step 5: Embrace Protective Styles

The hottest hair trend of summer might just be the one that keeps your hair safely tucked away. Braids, buns, twists, and other protective styles keep your ends (the oldest, most fragile part of your hair) from constant exposure to the elements — and they look effortlessly chic while doing it.

Loose braids and twist-outs are especially great for beach and pool days because they keep your hair contained without requiring tight elastics that can cause breakage. And the bonus? Salt water actually gives braids and waves beautiful texture.

If you’re wearing your hair up regularly, just be mindful of using snag-free scrunchies or soft hair ties rather than tight rubber bands, which can cause breakage at the point of tension.

Step 6: Turn Down the Heat (Tools, That Is)

We know — putting down the flat iron is easier said than done. But summer is the ideal time to experiment with air-drying and heat-free styling, if only because the warm weather means hair dries faster and naturally.

If you do use heat tools, always apply a heat protectant spray beforehand, and try to lower the temperature setting when possible. Many hair types that require 400°F in winter can be styled just as effectively at 350°F in summer, when hair is already more supple from humidity.

Embracing your natural texture — whether that’s waves, curls, or even a relaxed straight — during summer not only protects your hair but often results in some of your best hair days of the year.

Step 7: Hydrate From the Inside Out

It sounds basic, but it’s true: hydration starts from within. Hair follicles need adequate water and nutrients to produce strong, healthy strands — and the heat of summer means you’re likely losing more water through sweat than you realize.

Drinking enough water and eating a diet rich in biotin (eggs, nuts, sweet potatoes), omega-3 fatty acids (salmon, walnuts, flaxseed), and vitamins C and E all support hair health from the inside. Think of it as the long game: what you do internally shows up in your hair’s strength and shine over time.

Summer hair can be healthy, vibrant, and beautiful — it just requires a bit more intention than the rest of the year. Stock your shower shelf, protect before you play, and give your hair the moisture it’s asking for. Your strands will thank you come September.