Putting SPF on every morning but still burning? You'll need this fool-proof guide in a heatwave
While we should all be applying SPF every single day (yes, even when it’s cloudy), the recent turn in weather means it’s time to be even more diligent. In a heatwave, the sun's UVA and UVB rays are stronger than usual, making us more prone to both burning and long-term damage that shows up as premature ageing. Higher temperatures and humidity means we're also likely to sweat off our SPF faster, so a quick haphazard smattering of broad spectrum sunscreen first thing isn't going to cut it.
Unfortunately, unlike other beauty products, such as moisturisers and serums, that can be slapped on in a matter of seconds, SPF application requires some sort of technique if you want to be sure you’re getting full protection. “It’s important to take the time to apply SPF and do it right in order to ensure you get the protection that you think you’re getting,” says Dr Emma Cunningham, aesthetic and skin expert.

The truth is, if you don’t get your SPF application technique down, you’re not getting the protection that the bottle promises. And while you might be questioning how hard applying a cream to your skin can really be, we assure you that you’ll likely be missing out some important steps if you find your skin is still burning in the hot sun.
If you want to make sure your skin stays safe and protected from the sun’s harmful rays during the heatwave and beyond, this is everything skin experts want you to know about how to properly apply your SPF.
Always apply a separate SPF in the morning
This is quite possibly one of the most important parts of SPF application, and the simplest at that. Despite lots of skincare and makeup products containing SPF, experts warn that this is never enough to provide sufficient protection and should never be relied upon. Consultant dermatologist for Garnier, Dr Justine Kluk explains: “The main issue is that SPF moisturiser formulas are less likely to be rub-resistant than a sunscreen and you'll probably apply them a lot more thinly. For these reasons, they don’t offer the same level of protection.”
And as for makeup? It’s another hard no. “I strongly advise against using makeup as your sole form of SPF," says Dr Kluk. “We don’t apply these products in a thick or even enough layer to get anywhere close to the level of protection required,” she adds. "Makeup with SPF should be thought of as the cherry on top, not the main event,” she adds.

Always go for SPF30+
For years, high-level SPFs had a bad rep for being thick and claggy on the skin. However, new-gen formulas mean SPF30s and SPF50s are more wearable than ever. “I always advise sticking with an SPF50+, but at the very least you should use an SPF30," says Dr Emma Wedgeworth, consultant dermatologist for Heliocare. "We know that we often don’t apply as much sunscreen as we should and as regularly as we should, so it’s important to pick high factors for maximum protection, especially in hot temperatures.”
Use the two-finger rule for the face
You might have seen the uproar on social media when, just a couple of months ago, Gwyneth Paltrow revealed she ‘dots’ her SPF onto only the high points of her face. Dermatologists are keen to spread the word that this is categorically not how to do things. “You should aim for 2-3ml of sunscreen for your face and neck – this is about two full finger-lengths or half a teaspoon,” reveals Dr Wedgeworth.
While this might feel like a lot, it’s essential that you’re rubbing a thick, even layer into skin if you want to get the protection promised on the packaging. “It’s the standard amount that you need, regardless of your skin type,” she adds.

Rub it in properly and wait
It might sound obvious but making sure you rub your SPF in properly is key to ensuring your protection is evenly spread. “Apply a thick layer to the skin, on the face, onto the neck, on the tops of your ears and any leftovers on the back of your hands and the lips,” reveals Dr Hiva Fassihi, La Roche-Posay consultant dermatologist.
Once you have a good, even spread, you should wait for the skin to absorb the formula. “Allow 20 minutes for full absorption and then you can apply makeup over the top,” says Dr Fassihi. And the same wait rule applies if you’re going makeup free – always apply your SPF 20 minutes before heading outside, especially when the humidity is so high that your SPF formula is in danger of simply slipping off your skin before it's had a chance to work its magic.
Reapply every 2 hours
If you feel like you’re doing everything right, but still burning in the sun, this is likely where you’re falling short. It sounds icky, but given the current high temperatures and a lack of air-conditioning on public transport in the UK, the reality is, you're likely to be sweating off your sunscreen faster than normal. “If you are out and about in direct sunlight, you will need to reapply sunscreen every 2-3 hours," advises Dr Wedgeworth. “In very intense heat, you should reapply every hour.” A sweat-proof sunscreen is also a good investment right now.
Although most of us know we need to reapply our sunscreen, very few of us actually do. Why? Because it’s a faff and risks ruining our makeup. But the good news is, there are options that make the ordeal a whole bunch easier. For top-ups on the go, sprays are you best option as many are designed to be worn over makeup. Or if you want to stick to your regular formula and still wear base, Dr Wedgeworth has this advice: “Keep it light like a BB cream," she says. "Then every 2-3 hours, use micellar water to cleanse your face, smooth on a teaspoon amount of sunscreen and reapply your makeup over the top."

Now that you’re armed with all of the application knowledge you need to make sure your skin is full protected in a heatwave, these are the best on-the-go sunscreens, perfect for midday top-ups…





