It's a miserably common way to ruin a holiday: a first day exploring without much thought to sunscreen, then waking up lobster-red and unable to face the beach. The catch is that the sun's strength varies enormously by where and when you are, and your home instincts can badly mislead you. People from cooler climates often underestimate tropical or high-altitude sun, while even seasoned sun-seekers get caught out by reflection off water, sand or snow.
Why the sun hits harder in some places
UV — the part of sunlight that burns and damages skin — depends on several things. The closer you are to the equator, the more direct and stronger the sun. The higher the altitude, the thinner the atmosphere filtering it, so mountains and high cities burn faster than people expect. The time of day matters hugely: UV peaks in the middle hours, roughly late morning to mid-afternoon. Reflective surfaces multiply your exposure — water, white sand and snow bounce UV back up at you. And cloud cover lets plenty of UV through, so an overcast day is no guarantee of safety. The single most useful habit is checking the local UV index.
Using sunscreen so it actually works
Most sunburn among careful people comes not from skipping sunscreen but from using it wrong. The two biggest mistakes are applying too little and not reapplying. A broad-spectrum sunscreen — protecting against both UVA and UVB — of around SPF 30 or higher suits most travellers, but only if you put on a generous layer and top it up regularly, especially after swimming, sweating or towelling off. "Water-resistant" doesn't mean waterproof or all-day; it buys time, not immunity. Apply it before you go out, and don't forget the easily-missed spots: ears, the back of the neck, the tops of feet, and the part in your hair. Sunscreen is only one layer — a hat, sunglasses, light clothing and shade during peak hours do a lot of the work too.
A sensible routine, not an obsession
You don't need to hide from the sun. Check the UV index in the morning, apply sunscreen generously before heading out, reapply through the day, lean on a hat and shade during the fiercest midday hours, and drink plenty of water. Pay extra attention on the water, at altitude and in the tropics, and remember children and fair skin burn faster. Do that and the sun becomes a pleasure rather than a hazard.
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Questions
What SPF should I use?
A broad-spectrum sunscreen of around SPF 30 or higher suits most travellers. What matters even more than the number is applying enough and reapplying regularly — a high SPF used sparingly protects far less than a moderate one used properly.
How often should I reapply?
Roughly every two hours during sun exposure, and always after swimming, sweating heavily or towelling off. "Water-resistant" only buys extra time, not all-day protection — reapplying is the step people skip and then regret.
Can I burn on a cloudy day?
Yes — a lot of UV passes through cloud, so overcast days can still burn you. Don't judge the risk by how hot or bright it feels; check the UV index instead, which reflects the actual burning strength of the sun.
Why does the sun feel stronger abroad?
Because UV is stronger nearer the equator and at high altitude, and reflective water, sand or snow multiplies it. If you're from a cooler climate, tropical or mountain sun can be far harsher than you're used to.
When is the sun strongest?
UV typically peaks during the middle of the day, roughly late morning to mid-afternoon. Seeking shade or covering up during those hours is one of the easiest ways to avoid burning.
Is sunscreen alone enough?
It's one layer, not the whole defence. Combine it with a hat, sunglasses, light covering clothing and shade during peak hours for the best protection. Relying on sunscreen alone, especially if under-applied, leaves gaps.
This is general information, not medical advice. Sun strength varies by location, season and conditions, and skin sensitivity differs from person to person. Follow the product instructions and consult a doctor or pharmacist for specific skin concerns or for children.