Oily Skin During a Heatwave: Should You Still Moisturize?
Does your skin become shiny first thing in the morning? Do you feel like your face is oily all day long whenever temperatures rise above 35°C (95°F)? If so, you may be tempted to skip your moisturizer, thinking your skin is already producing enough sebum.
Yet, this is often the biggest mistake you can make during a heatwave.
Oily skin is not necessarily well-hydrated skin. On the contrary, extreme heat can lead to significant dehydration of the epidermis, prompting the skin to produce even more sebum in an attempt to protect itself.
The result? You enter a vicious cycle where the less water your skin retains, the oilier it appears.
The best strategy is not to stop using skincare products, but to choose formulas that provide the hydration your skin needs while helping control excess shine over time.
Should You Moisturize Oily Skin During a Heatwave?
Yes. Even during periods of extreme heat, oily skin still needs hydration. High temperatures increase water loss from the skin. Without adequate hydration, your skin may produce even more sebum to compensate, making shine more noticeable. The ideal solution is to use a lightweight moisturizer that also helps mattify the skin and restore its natural balance.
Why Do People Think Oily Skin Is Already Hydrated?
This misconception is extremely common. When the face looks shiny, many people assume their skin is "over-hydrated." In reality, what you're seeing is not water—it's sebum.
Sebum is an oily substance produced by the sebaceous glands. Its role is to protect the skin against external aggressors and reduce water loss. Water and sebum therefore serve two completely different purposes.
Your skin can:
- produce a large amount of sebum;
- lack water;
- feel uncomfortable;
- feel tight after cleansing;
- while still looking very shiny.
Dermatologists refer to this condition as dehydrated oily skin.
What Really Happens During a Heatwave?
When temperatures rise above 30°C (86°F), several biological processes occur simultaneously.
Sweating Increases
This is a completely natural process that helps regulate body temperature. However, sweating also leads to significant water evaporation from the skin's surface.
Heat Disrupts the Skin's Natural Balance
The hotter it gets:
- the more water the skin loses;
- the more the hydrolipidic barrier is challenged;
- the greater the impact of environmental aggressors.
Air conditioning, hot winds, and repeated sun exposure can make these effects even worse.
Sebaceous Glands Become More Active
To reduce water loss, the skin may increase sebum production. This natural defense mechanism explains why many people notice oilier skin during the summer.
The problem is that this natural response can never replace proper hydration.
Can You Have Oily AND Dehydrated Skin?
The answer is yes. In fact, it's one of the most common skin conditions during periods of extreme heat.
Here are some signs that your skin may be both oily and dehydrated:
- your skin becomes shiny very quickly;
- your pores appear larger;
- your skin feels tight after cleansing;
- your complexion looks less even;
- your makeup doesn't last as long;
- your skin looks oily again just a few hours after cleansing.
These signs often indicate an imbalance between the skin's water content and its sebum production.
Why Stopping Your Moisturizer Is a Bad Idea
When faced with excess shine, many people make what seems like a logical decision—but it's actually counterproductive. They stop using moisturizer altogether.
However, dehydrated skin may react by producing even more sebum. The result can be:
- more shine;
- more visible pores;
- an uneven skin texture;
- feelings of discomfort;
- an increased risk of blemishes.
Instead of eliminating moisturizer, replace rich creams with a lightweight formula that helps maintain your skin's natural balance.
Give Your Skin the Hydration It Needs—Without the Greasy Feel
MEL'OYA® Mattifying Complexion Care has been specifically formulated for combination to oily Black, Brown, and mixed skin. Its lightweight texture hydrates the skin while helping reduce excess shine and visibly refine skin texture over time.
Why a Mattifying Moisturizer Is Better Than a Regular Moisturizer in Summer
Not all moisturizers are designed for the same purpose. Some focus primarily on nourishing the skin, while others are specifically formulated for skin prone to excess oil.
During a heatwave, choosing a product that combines hydration with mattifying benefits helps meet two essential skincare needs:
- maintain the skin's natural moisture levels;
- help control shine throughout the day.
MEL'OYA® Mattifying Complexion Care has been developed with this exact goal in mind. Its lightweight texture absorbs quickly without leaving a greasy residue.
With daily use, it helps restore the skin's natural balance. Excess shine appears reduced, skin texture looks smoother, and the complexion appears more even.
It is an ideal daily moisturizer for anyone looking to hydrate oily skin without making it feel heavier or greasier.
How to Choose the Right Moisturizer for Oily Skin in Summer
Before choosing your moisturizer, ask yourself these four questions:
Is the Texture Lightweight?
Fluid or gel-cream textures are generally much more comfortable during very hot weather.
Does It Truly Hydrate?
Hydration remains essential—even if your skin looks oily.
Does It Help Control Shine?
The goal is to reduce excess oil without drying out the skin.
Is It Suitable for Daily Use?
During a heatwave, consistency is far more beneficial than harsh treatments.
MEL'OYA® Mattifying Complexion Care meets all of these criteria by providing lightweight hydration while helping improve the long-term appearance of combination and oily skin.
Break the Cycle of Oily Skin
Hydrate your skin while helping control excess oil over time with MEL'OYA® Mattifying Complexion Care.
Healthy Hydration Always Starts with Proper Cleansing
Before applying your moisturizer, it's essential to remove the impurities that accumulate throughout the day, including:
- sweat;
- excess sebum;
- pollution;
- sunscreen residue.
The goal is not to strip the skin, but to cleanse it gently while preserving its natural protective barrier.
CLEAN'OYA® Purifying Cleansing Foam effectively removes impurities without irritating the skin, leaving it perfectly prepared for the next steps of your skincare routine.
Start Your Routine with Perfectly Clean Skin
Cleanse your skin with CLEAN'OYA® Purifying Cleansing Foam to remove excess oil, sweat, and impurities before applying your daily skincare products.
The Ideal Skincare Routine for Oily Skin During a Heatwave
When temperatures soar, the key isn't to use more products—it's to follow a simple, consistent routine that meets your skin's needs. In just three steps, you can help keep your skin fresh, comfortable, and shine-free throughout the day.
Step 1: Cleanse Away Excess Oil and Sweat
During a heatwave, the skin accumulates more sweat, sebum, dust, and sunscreen residue. Cleansing morning and evening removes these impurities while respecting the skin's natural balance. CLEAN'OYA® Purifying Cleansing Foam gently purifies the skin, leaving it fresh, clean, and perfectly prepared for the next steps of your routine.
Step 2: Hydrate While Controlling Shine
Even if your skin looks oily, it continues to lose water under high temperatures. Applying a suitable moisturizer helps maintain the skin's moisture balance without feeling heavy.
MEL'OYA® Mattifying Complexion Care hydrates the skin while helping reduce excess shine. Its lightweight texture absorbs quickly, visibly refines skin texture, improves complexion evenness, and leaves no greasy finish. Applied morning and evening, it becomes an essential ally for combination and oily skin throughout the summer.
Step 3: Protect Your Skin with SPF 50 Every Morning
Even in the city or on cloudy days, UVA and UVB rays continue to reach your skin. They contribute to premature skin aging, dehydration, and may worsen hyperpigmentation.
SUN'OYA® SPF50 Sunscreen Fluid provides very high UVA and UVB protection in a lightweight, non-greasy formula with a comfortable matte finish. Apply it every morning as the final step of your skincare routine, and reapply throughout the day whenever sun exposure continues.
Protect Your Skin Without Compromising Comfort
SUN'OYA® SPF50 Sunscreen Fluid delivers very high sun protection while leaving a lightweight matte finish, making it ideal for combination and oily skin.
Frequently Asked Questions
Does oily skin really need moisturizer during summer?
Yes. Oily skin can still become dehydrated, especially during a heatwave. Proper hydration helps maintain the skin's balance and may reduce excess sebum production caused by dehydration.
Why does my skin become shinier in hot weather?
Heat increases sweating and can stimulate sebum production. The combination of sweat and oil creates a shiny appearance, but this doesn't mean your skin is properly hydrated.
What type of moisturizer should I use for oily skin during a heatwave?
Choose a lightweight, non-greasy moisturizer that hydrates while helping control excess shine and improve skin texture.
Should I wear sunscreen if I already have oily skin?
Absolutely. A sunscreen formulated for combination and oily skin protects against UVA and UVB rays without leaving a greasy finish and helps prevent sun damage and hyperpigmentation.
What is the best skincare routine for oily skin in hot weather?
A simple routine works best: gently cleanse morning and evening, apply a lightweight mattifying moisturizer, and finish every morning with an SPF50 sunscreen suitable for your skin type.
Key Takeaways
Oily skin should never be deprived of hydration—even during a heatwave. Providing the right level of moisture while controlling excess shine helps maintain healthy, comfortable, and balanced skin.
For a complete summer skincare routine:
- Cleanse with CLEAN'OYA® Purifying Cleansing Foam.
- Hydrate & Mattify with MEL'OYA® Mattifying Complexion Care.
- Protect every morning with SUN'OYA® SPF50 Sunscreen Fluid.
By following these three essential steps, you can help your skin stay fresh, comfortable, and visibly more balanced—even during the hottest days of summer.
Discover the Complete IN'OYA Routine for Combination and Oily Skin
Discover My Complete RoutineArticle written by the IN'OYA team, specialists in dermocosmetic skincare for Black, Brown, and mixed skin.