How to have beautiful skin in summer?

Heat, sweat, UV rays: your skin's behavior changes as soon as the thermometer rises, even if you don't notice it immediately.

Specifically, heat increases sebum production, accelerates perspiration, and simultaneously emphasizes skin's water loss. The result: your skin can be shiny on the surface while being dehydrated deep down, which explains why the same routines you used in winter no longer work as well.

You'll see why heat disrupts your skin, what mistakes worsen it, and how to adjust your morning and evening routine to keep your skin balanced until the end of summer.

Why heat changes your skin's needs 🌡️

A rise of just 1°C in skin temperature increases sebum secretion by about 10%, according to a reference dermatology study. This is why normal or combination skin can become oily in summer, without anything else in your routine having changed.

At the same time, perspiration intensifies to regulate body temperature. Mixed with sebum and impurities, it can clog pores and promote blemishes, especially on the forehead, nose, and chin.

The problem is that this excessive sebum production masks an inverse reality: heat also increases trans-epidermal water loss. Your skin can therefore be oily on the surface and dehydrated deep down at the same time. It's this contradiction that leads many people to react incorrectly, by drying out skin that actually needs to be rehydrated, perpetuating the vicious cycle of skin that is both shiny and tight.

Mistakes that damage your skin in summer ⚠️

When faced with shiny skin, the most common reflex is to cleanse more frequently or choose drying products to mattify. This is precisely the mistake to avoid: stripping the skin weakens its skin barrier, and it reacts by producing even more sebum to compensate.

Expert tip: completely stopping moisturizer when skin is shiny in summer is a common mistake. Shininess often comes from dehydration compensated by excess sebum, not from excess hydration. It's better to lighten the texture (gel or fluid) rather than skip the step entirely.

Second classic mistake: skipping sunscreen on cloudy days or in the city. UV rays pass through clouds and windows, and cumulative exposure over several weeks is what accelerates skin aging and promotes dark spots.

Finally, exfoliating too often to "even out" a dull complexion weakens a barrier already stressed by heat. A gentle scrub once or twice a week is more than enough, even in summer.

Another less obvious trap: air conditioning. It dries out the ambient air almost as much as heating in winter, which accentuates skin dehydration during days spent in the office or in the car. If you alternate between very hot outdoors and air-conditioned indoors, your skin experiences two opposing aggressions in the same day, which explains feelings of tightness at the end of the day even on usually oily skin.

The last, more subtle, mistake concerns the frequency of sunscreen reapplication. SPF applied in the morning loses much of its effectiveness after two hours of direct exposure, especially with sweating or swimming. Without reapplication during the day, the actual protection drops well below the index indicated on the bottle.

The routine for refreshed skin morning and evening 💧

To keep skin refreshed in summer, the routine is built around three pillars: gentle cleansing, light but sufficient hydration, and daily sun protection, morning and evening depending on the step.

In the morning, cleansing with water or a gentle cleansing gel is enough to remove sebum accumulated overnight without irritating the skin. This is followed by a hyaluronic acid serum, which retains water in the superficial layers of the skin without leaving a greasy film, unlike richer textures. You can check out the selection of Korean moisturizers to find a gel texture suitable for high heat. The routine always ends with sun protection, without exception, even under a cloudy sky.

In the evening, the priority step is double cleansing: an oil or balm to dissolve sunscreen and daily sebum, followed by a gentle cleanser to remove residues. You can find formulas designed for hot climates in our collection of Korean facial cleansers. Then, a soothing active ingredient like niacinamide helps rebalance the skin before applying a thinner layer of moisturizer than usual.

The topical routine is not enough if internal hydration doesn't follow: the skin is the last organ served when the body lacks water, after vital organs. In summer, perspiration accelerates this loss, which makes oral water intake all the more crucial for the skin's suppleness and radiance, in addition to topically applied treatments.

How to adjust your routine according to the weather 🌦️

Your summer routine should not be fixed: a day at 22°C by the sea and an urban heatwave at 38°C do not expose your skin to the same constraints, even if the calendar indicates the same season.

During a heatwave, further lighten the routine: a hydrating serum with a watery texture replaces morning cream, and evening double cleansing becomes a priority to remove accumulated sweat and sebum. A thermal water or floral water mist, kept in the refrigerator, helps reduce the sensation of heat on the face without deep rehydration, so it should be used as a complement to a treatment rather than a replacement.

Conversely, cooler or cloudy days never exempt you from sun protection. UVA rays, responsible for skin aging and spots, pass through clouds and windows all year round. Only the intensity of the perceived heat changes, not the UV exposure.

Sensitive skin: how to adjust your routine in summer 🌿

For sensitive skin, summer is a risky period: heat stimulates sweat glands, and stagnant sweat on an already weakened barrier more easily triggers redness and tightness. The priority becomes soothing, even before hydration.

Ingredients to prioritize are those that calm inflammation without weighing down the skin: centella asiatica, panthenol, and especially heartleaf, a Korean plant known for its immediate soothing effect on reactive skin. Our full review of the Anua brand details the heartleaf-based formulations best suited for sensitive skin.

For sun protection, sensitive skin should avoid alcohol-based or overly fragranced formulas, which accentuate stinging under the effect of heat. A fluid, fragrance-free texture remains the safest choice for a full summer day without reaction.

Choosing the right summer skincare products ✅

The right summer skincare product is chosen primarily by texture, not by brand: always prioritize gels and fluids over rich creams, regardless of your usual skin type.

For sun protection, aim for at least SPF 50 if you are exposed for a long time, and a non-whitening formula if you have darker skin. Our review of Beauty of Joseon sunscreens compares several textures according to skin needs.

For hydration, primarily look for hyaluronic acid and glycerin at the top of the INCI list: these are the most effective humectants for retaining water without clogging pores during periods of high heat.

The table below summarizes the priorities according to your skin type, to avoid choosing the wrong texture when renewing your routine:

Regarding sun protection, always aim for SPF 50 in direct exposure and reapply every two hours if you sweat or swim. A high index applied only once in the morning protects significantly less well than an SPF 30 reapplied regularly throughout the day.

In summary, three things to remember for summer: heat creates skin that is both oilier on the surface and more dehydrated deep down, stripping the skin always aggravates the problem rather than solving it, and sun protection is never optional, even on cloudy days.

If you don't know where to start, take the free skin diagnostic to receive a personalized routine, or discover our selection of Korean moisturizers adapted for skin that lacks water in summer.