How to Protect Your Skin During the UK Heatwave

With temperature forecasts soaring as high as 31°C in many parts of the UK, the summer heatwave is officially here. However, with rising temperatures also come intense UV exposure, increased humidity, and excessive sweating, all of which can take a serious toll on your skin. From sunburn and breakouts, to flare-ups of chronic conditions like rosacea or eczema, hot weather presents an array of skincare challenges to manage.

That’s why we spoke to Dr. Kaywaan Khan, Advanced Aesthetics Practitioner and Private GP at Harley Street’s Hannah London Clinic, who shares some expert-approved ways to keep your skin clear and protected during this stretch of scorching summer days.

1. Use a broad-spectrum SPF 50

While sun protection is a daily essential, it becomes a non-negotiable in the middle of a UK heatwave. Make sure to use a minimum SPF 50 with both UVA and UVB protection to guard against sunburn and delay signs of premature ageing. This habit also reduces the risk of long-term skin damage such as sunspots and hyperpigmentation. However, it’s not enough to apply sunscreen once in the morning. Sunscreen must be reapplied every 2 hours, especially when outdoors for extended periods of time. UV rays can also penetrate through windows, so it’s important to apply even when indoors or driving. Also, swimming, sweating and physical activity can weaken the SPF barrier, so remember to top up and keep skin protected.

2. Don’t skip moisturiser just because it’s hot

Hot weather can easily dehydrate our skin, so failing to moisturise can cause it to overcompensate by producing excess oil and sebum. This could lead to clogged pores and breakouts, which can be harder to handle in hot weather due to increased sweat and skin sensitivity. Instead, switch to a lightweight water or gel-based moisturiser that strengthens your skin barrier, without leaving any sticky or greasy residue. Opt for deeply hydrating ingredients like hyaluronic acid and glycerin, not only to retain moisture but also soothe and prevent post-sun inflammation.

3. Avoid active skincare during peak sun hours

Certain skincare actives can make your skin more sensitive to sunlight. This includes retinoids, AHAs, BHAs, and even high percentages of Vitamin C. Instead of supporting skin health, these actives can cause burns, as well as increase the risk of hyperpigmentation and irritation. If spending extended amounts of time in the sun, especially during peak hours between 11AM to 3PM, I recommend pausing the use of actives during the day and only using them at night. If you’re unsure about certain ingredients or are noticing signs of sensitivity after prolonged heat and sun exposure, immediately stop the use of these products and book a consultation with a skincare professional for more personalised guidance.

4. Cool your skin, don’t shock it

After coming in from the heat, resist the urge to rub an ice cube directly against your skin. Extreme temperature changes can trigger sensitivity and even cause broken capillaries which are small, visible red or purple veins that appear just beneath the surface of the skin. This can often be seen forming around the nose or cheeks. To prevent this, try a gentler approach with a soft, damp cloth on your forehead to gradually cool yourself down. As well as this, you can spritz on a hydrating facial mist with calming ingredients like aloe vera or niacinamide to soothe heat-stressed skin without triggering inflammation.

5. Watch out for heat-triggered flare-ups

High temperature and sweat can aggravate chronic skin concerns such as rosacea, eczema, and dermatitis. This can lead to flare-ups marked by intensified redness, irritation, and in some cases, the worsening of dark spots or pigmentation. While flare-ups typically look different for everyone, common symptoms to watch out for include increased sensitivity from itching, stinging, and dryness. If you notice any of these signs, avoid using harsh products and consult with your GP as soon as possible. A blood test can help confirm a diagnosis and guide you toward the appropriate treatment. Most flare-ups can be managed with aesthetic solutions like chemical peels to reduce discolouration and hydradermabrasion to replenish lost moisture

6. Consider Botox for sweat-related breakouts and discomfort

Excessive sweating, otherwise known as hyperhidrosis, can clog pores and melt away SPF, a combination that can lead to irritation and breakouts. This is especially the case on the face, scalp, or underarm areas. Botox isn’t just for wrinkles. In fact, when used medically, it can temporarily block overactive sweat glands that trigger unwanted skin concerns. Botox for hyperhidrosis is a safe, minimally invasive treatment that can significantly improve both skin clarity and quality of life during the summer months. This treatment can provide up to six months of relief from discomfort, odour, and skin congestion caused by excessive sweating.

7. Wear UPF clothing for added protection

In extreme heat, sun protection shouldn’t stop at skincare. Ultraviolet Protection Fator (UPF)-rated clothing is specially designed to shield your skin from harmful UV rays. It also offers a reliable defence when shade or sunscreen isn’t enough. I suggest looking for breathable fabrics with at least a UPF 50+ rating. You can also complete the look with wide-brimmed hats and UV-protective sunglasses to guard other high-risk areas. Physical barriers like these can significantly reduce sun exposure and protect areas we often overlook like the scalp, ears, and chest.