Key facts
What to do
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Detailed explanation5 short sections
Check the value for the actual place and time
Open a weather service or the WHO-linked SunSmart Global UV App for the location and day being planned. The UV Index changes through the day, so a remembered seasonal impression or an old screenshot is not a substitute for the value shown for the intended time.
Treat the reading as a radiation measure, not a temperature or cloud-cover score. WHO says that as the index rises, the potential for skin and eye damage increases and the time needed for harm falls. This page deliberately does not copy a live Pattaya number.
Use UVI 3 as the protection trigger
WHO advises protection when the UV Index is 3 or higher. Read the current value before setting the beach schedule, then check it again if the visit moves to a different time or day. A daily maximum does not mean the same exposure continues unchanged for every hour.
The threshold is public-health guidance, not an individualized medical limit. Anyone with a specific medical concern should use qualified clinical advice rather than treating this page as a personal clearance.
Build protection from several layers
WHO describes clothing, a hat, sunglasses, shade and sunscreen as complementary measures. Plan the combination before arriving rather than assuming one umbrella or one sunscreen application removes the need to manage exposure. Sunscreen should not be used to extend time in the sun.
Choose practical coverage for the activity and keep protection available after swimming or sweating. This guide does not endorse a product, SPF for an individual, application quantity or reapplication schedule beyond directing readers back to the current WHO guidance and product instructions.
Do not treat beach shade as complete protection
WHO warns that shade structures do not offer complete UV protection because scattered radiation and reflections still reach people outdoors. Bright water and sandy beaches are specifically relevant reflective surfaces, so sitting under shade does not make the UV Index irrelevant.
Cloud, wind or a comfortable temperature can also make conditions feel less intense without answering the UV question. Keep the radiation check separate from the weather and marine checks needed for rain, waves, warnings or whether a particular activity will operate.
Keep the beach decision broader than UV
A UV Index answers one part of a beach plan. It does not establish water quality, currents, jellyfish reports, swimming suitability, accessibility, shade availability or a boat operator's decision. Use the related marine-weather and swimming-evidence guides for those separate questions.
Repeat the live check close to departure and adapt the timing or protection plan to the result actually displayed. If the data source is unavailable or unclear, do not replace it with a typical Pattaya value; use another current responsible weather or public-health source.
Evidence
Sources
2 dated records support the material facts on this page.
- Radiation: The ultraviolet (UV) index (opens in a new tab)
World Health Organizationprimary documentChecked
- Radiation: Protecting against skin cancer (opens in a new tab)
World Health Organizationprimary documentChecked