Sun and Heat Abroad: Separating Myth From Guidance
Sun and Heat Abroad: what people commonly get wrong, set against what published UK guidance says.
Heatstroke is a medical emergency, and sunburn abroad is where a substantial share of lifetime UV damage is acquired.
Key takeaways
- Sunscreen: at least SPF 30 with 4-star or 5-star UVA, reapplied every 2 hours
- Peak UV: usually 11am to 3pm
- Most useful single change: Use shade and clothing first; sunscreen last.
- Commonest mistake: Midday sun exposure in hot climates.
- See a doctor if any of the signs under "When to speak to a doctor" below apply to you.
What the guidance actually says
Before the corrections, the published figures. Everything below is measured against these.
| Measure | Figure |
|---|---|
| Sunscreen | at least SPF 30 with 4-star or 5-star UVA, reapplied every 2 hours |
| Peak UV | usually 11am to 3pm |
| Heat exhaustion | cool the person and rehydrate; should improve within 30 minutes |
| Heatstroke | a medical emergency; body temperature above 40C with confusion |
| Higher risk | older adults, young children, some medicines |
Where people go wrong
All of these come up regularly. All of them run against the published position.
- Midday sun exposure in hot climates
- Alcohol in extreme heat
- Leaving children or anyone else in parked vehicles
What to do instead
- Use shade and clothing first; sunscreen last
- Reapply sunscreen every two hours and after swimming
- Drink more than you think you need in heat
- Check whether your medicines increase sun sensitivity or dehydration risk
The part that is genuinely uncertain
Guidance changes, and it changes because evidence does. The figures above reflect current UK guidance from the bodies named at the foot of this page; where those bodies revise their position, theirs is the account to follow rather than this one.
Where to go next
- Sun and Heat Abroad: A Practical Checklist
- Sun and Heat Abroad: A Beginner-Friendly Start
- Sun and Heat Abroad — the reference entry
- What the Guidance Really Says About Travelling with Medicines
- The Evidence on Travel Insurance and Healthcare Abroad, Without the Hype
When to speak to a doctor
Call 999 for heatstroke: a temperature above 40C with confusion, seizures, loss of consciousness, hot dry skin or rapid breathing — cool the person aggressively while waiting. Seek help if heat exhaustion does not improve within thirty minutes of cooling and rehydration.
Where this comes from
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.
Spotted something wrong? Report an error on this page. We correct on the page and say what changed.
