Why Your Hair Gets Dehydrated in Summer and What to Do About It

Dry, frizzy, and brittle hair — it’s one of the most common complaints dermatologists hear from women in the summer months. But most women don’t realize: hair dehydration is not just cosmetic, it’s structural. When the cuticle weakens, the entire fiber is compromised.

This guide explains why hair dries out in summer, what signs to look for, and the expert-approved steps to prevent lasting damage.

Why Does Hair Get Dehydrated in Summer?

UV Damage to the Hair Cuticle

Just like your skin, your hair is vulnerable to the sun. UV rays break down keratin and natural proteins, leaving strands weak and porous.

Chlorine & Saltwater Exposure

Pool chemicals strip protective oils. Saltwater draws moisture out of the fiber, leaving it coarse and tangled.

Heat, Humidity & Frequent Washing

Sweat, humidity, and daily shampooing open the cuticle, causing frizz, dryness, and breakage.

Signs Your Hair Is Dehydrated

• Persistent frizz that resists styling

• Rough, brittle ends that split easily

• Dull strands lacking shine

• Tangling and breakage after swimming or sun exposure

Expert Tips to Prevent Summer Hair Dehydration

Weekly Deep Hydration

Dermatologists recommend a weekly mask to restore elasticity and smooth the cuticle.

Daily Nourishment

Leave-in hydration prevents mid-day dryness and environmental stress.

Oil-Based Protection

Botanical oils seal in moisture and protect against UV, humidity, and pollutants.

FAQ: Summer Hair Hydration Questions

Q: Can the sun really damage my hair?
Yes — UV rays degrade proteins, leaving the fiber porous. That’s why hair often feels weaker after summer.

Q: How often should I use a hair mask in summer?
At least once a week, or twice if your hair is color-treated or frequently exposed to chlorine/saltwater.

Q: What’s the difference between hydration and moisture?
Hydration replenishes water inside the fiber; moisture (via oils) seals it in. You need both for lasting softness.

The Takeaway

Summer hair dehydration is real — but preventable. Awareness is the first step. With consistent care, you can maintain shine, strength, and softness all season long.

👉 For specific, clinical yet sensorial solutions, see Phyto’s botanical repair and hydration range.