SunticUV index in Cancún today
Cancún sits in the tropics on Mexico's Caribbean coast, so the sun is strong year-round and midday UV climbs to very high or extreme through a long warm season. The only accurate figure is a live one for your exact spot: Suntic shows Cancún's real-time UV index and a 10-day forecast.
Sun and UV in Cancún
On the low-latitude Yucatán Peninsula, Cancún gets powerful sunshine almost every day, with midday UV reaching very high to extreme levels from spring through autumn and staying significant even in winter. The sea breeze and humidity make the heat feel bearable while UV stays punishing, and brief tropical downpours rarely cut the strong morning and midday sun for long.
When is UV highest in Cancún?
UV is highest around solar noon (broadly 10am to 4pm) and strongest across March to September. The exact peak shifts with the season and the day's weather. For more on this, see when is the sun strongest.
The UV index scale
| UV index | Risk level | What to do |
|---|---|---|
| 0-2 | Low | Minimal risk. Safe to be outside; sunglasses on bright days. |
| 3-5 | Moderate | Take care at midday. Use SPF 30+, a hat and shade around noon. |
| 6-7 | High | Protection needed. SPF 30+, cover up, seek shade 10am-4pm. |
| 8-10 | Very high | Extra protection. Avoid the sun at midday; SPF, clothing and shade are essential. |
| 11+ | Extreme | Take all precautions. Unprotected skin can burn quickly; stay inside or fully covered at peak hours. |
UV index categories follow the World Health Organization / US EPA scale.
Staying sun-safe in Cancún
- White Caribbean sand and turquoise water reflect UV back at you, so beach and snorkelling days stack exposure on top of the index.
- The pleasant coastal breeze masks how strong the UV is, so go by the index rather than how hot you feel.
- Long days at the beach or exploring Mayan ruins mean hours in open sun; reapply sunscreen and seek shade at midday.
Wherever you are, the basics hold: use broad-spectrum SPF 30+, seek shade around midday, cover up, and never let your skin burn. See our sunburn prevention tips.
See Cancún's live UV index
Suntic turns the live UV index into personal safe-sun times, sunscreen reminders and vitamin D tracking on your iPhone.
