Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents and visitors of Guaratuba, Brazil, given its tropical climate and exposure to intense sunlight. Awareness of UV levels is vital for protecting against sunburn and preserving long-term skin health, especially during the peak hours from 10 AM to 2 PM when UV rays can reach hazardous levels, peaking at a UV Index of 6. As part of the Cfa climate zone, Guaratuba experiences warm temperatures year-round, making it essential to stay informed about UV radiation to enjoy the beautiful beaches safely while minimizing the risk of skin damage. Stay vigilant and protect your skin when enjoying outdoor activities in this stunning coastal paradise!
The UV Index today showcased a notable increase from the early morning hours, starting at a gentle 1 at 07:00 and 08:00. As the sun rose higher in the sky, the index climbed steadily, reaching a significant 6 by 12:00, indicating a peak in UV radiation and the need for sun protection. The afternoon saw a slight decline, with values dropping to 4 at 14:00 and falling further to 2 by 15:00. As the day wound down, the UV index returned to a safer range, ending the day at 0 by 19:00. It’s crucial to stay informed and safeguard your skin during those high UV hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 2 | low | 45 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The seasonal UV changes indicate that January to March experiences extremely high UV Index levels, with values peaking at 15 in January and February, necessitating a burn time of just 10 minutes. As spring approaches, the UV Index begins to moderate, reaching 7 in May and 6 in June and July, where the burn time extends to 25 minutes. However, UV levels rise again in late summer and fall, particularly in August and September, both classified as very high, with a significant decrease in burn time to 15 minutes. The high-risk months are therefore noted as January through March and October through November, where extreme levels demand heightened caution. Visitors and residents should be advised to prioritize sun safety practices throughout these months, utilizing broad-spectrum sunscreen, wearing protective clothing, and seeking shade during peak sun hours to minimize the risk of UV exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Guaratuba | 15 | 14 | 12 | 10 | 7 | 6 | 6 | 8 | 10 | 13 | 14 | 14 |
| Rio de Janeiro UVI | 15 | 14 | 13 | 10 | 7 | 6 | 7 | 9 | 11 | 12 | 13 | 15 |
| Sao Paulo UVI | 16 | 15 | 12 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 15 |
| Belo Horizonte UVI | 17 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 12 | 13 | 14 | 16 |
| Salvador UVI | 14 | 14 | 14 | 13 | 10 | 9 | 9 | 12 | 12 | 15 | 15 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |