Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Santa Cruz das Flores, Portugal, where the beautiful temperate maritime climate can lead to varying levels of sun exposure. Awareness of UV levels is essential not just for preventing painful sunburns, but also for maintaining long-term skin health. With daily peaks, particularly around midday when readings can soar to 11, it’s vital to take precautions during summer months. As you enjoy the stunning landscapes of this picturesque island, remember that even on cooler days, UV rays can still pose a significant risk—so stay informed and protected!
The UV Index today presents a clear trajectory of increasing intensity. Starting at 7:00 AM with a gentle value of 1, it gradually climbs through the morning, reaching 6 by 11:00 AM. A noticeable leap occurs noon, peaking at a blazing 11 from 1:00 PM to 2:00 PM— time for sun protection is vital! As the afternoon unfolds, values gently descend, with 8 at 4:00 PM, tapering to 2 as evening approaches. It's a reminder that while the sun's rays can be invigorating, they can also be potent—stay safe and enjoy the day!
| 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 | 6 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal changes, with March through September being the highest risk months for UV exposure. In March, the index rises to 7 (high), escalating sharply to 11 (extreme) by June. The months of April and May also feature very high levels at 8 and 10, respectively, indicating that sun protection is crucial. Notably, July and August maintain very high levels before tapering off in September at 8. To safeguard against skin damage, visitors and residents are advised to limit sun exposure during these peak months, especially when the burn time is as low as 10-15 minutes. Wearing sunscreen, protective clothing, and seeking shade are essential practices, particularly from late spring through summer when UV radiation is most intense. In contrast, the months of January, February, November, and December present a lower risk with moderate indexes, allowing for more lenient sun exposure precautions.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Braga UVI | 2 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 4 | 2 |
| Porto UVI | 2 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 4 | 2 |
| Amadora UVI | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Lisbon UVI | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Setubal UVI | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Santa Cruz das Flores | 3 | 4 | 7 | 8 | 10 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |