Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Mahina, French Polynesia, where the tropical climate means strong sunlight year-round. With UV levels peaking between 10 AM and 2 PM, it’s essential to gauge these levels to protect yourself from sunburn and maintain long-term skin health. Knowing when to seek shade or apply sunscreen can significantly reduce risks associated with UV exposure. In a region celebrated for its breathtaking landscapes, staying sun-safe ensures you enjoy every moment under the beautiful Polynesian sun!
The UV Index throughout the day presents an intriguing pattern of intensity. At 7:00 AM, the index starts at a low 1, indicating minimal risk for most individuals. As the sun rises higher, it gradually climbs to 2 by 8:00 AM and reaches 3 by 9:00 AM. The real surge occurs around 10:00 AM, where it peaks at 6, then soars to a maximum of 8 at 12:00 PM, creating a high-risk situation for unprotected skin. After this midday peak, the index begins to decline, dropping back to 7 at 1:00 PM and down to 6 by 2:00 PM. The afternoon sees a further decrease, with levels falling to 3 at 3:00 PM, before tapering to 1 by 4:00 PM and slipping to 0 as evening approaches at 6:00 PM. With this data, it's clear that midday is the critical time to be mindful of sun exposure!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 3 | moderate | 30 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 |
Throughout the year, UV Index levels show significant seasonal variations, with the highest risk occurring from January to April where the index reaches extreme levels, peaking at 16 in January. This period requires heightened caution for both visitors and residents, as the burn time is only 10 minutes. As the months transition into May and June, the index drops but remains classified as very high, with a burn time extending to 15 minutes. September sees a return to extreme conditions, resembling those at the year's beginning. The high-risk months are thus January through April and September through October, with November and December also warranting caution due to extreme UV levels. Visitors and residents are advised to take preventative measures during these months, such as wearing protective clothing, applying sunscreen regularly, and seeking shade during peak sunlight hours to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mahina | 16 | 15 | 15 | 13 | 10 | 8 | 8 | 10 | 13 | 15 | 15 | 15 |
| Pirae UVI | 16 | 15 | 15 | 13 | 10 | 8 | 8 | 10 | 13 | 15 | 15 | 15 |
| Punaauia UVI | 16 | 15 | 15 | 13 | 10 | 8 | 8 | 10 | 13 | 15 | 15 | 15 |
| Papeete UVI | 16 | 15 | 15 | 13 | 10 | 8 | 8 | 10 | 13 | 15 | 15 | 15 |
| Faaa UVI | 16 | 15 | 15 | 13 | 10 | 8 | 8 | 10 | 13 | 15 | 15 | 15 |