Last updated: July 2, 2025
Understanding the UV Index is essential for residents and visitors in Grande Riviere Noire, Mauritius, where the sun's rays can be intense. Awareness of UV levels helps you take proactive measures against sunburn and skin damage, ensuring long-term skin health. With a tropical climate that features high UV exposure—especially during midday hours when the index peaks at 8—it's crucial to stay informed about daily UV trends. By monitoring these levels, you can safely enjoy the beautiful beaches and outdoor activities this stunning region has to offer, while minimizing the risks associated with sun exposure.
At sunrise, the UV Index begins at a gentle 1 at 07:00, rising gradually as the sun climbs higher. By 09:00, it reaches 3, indicating a moderate level of UV radiation. The heat of the day peaks at 12:00 with a high of 8, suggesting it’s time to seek shade or apply sunscreen. As the afternoon progresses, the index slightly drops to 7 at 13:00 and continues to decline, settling at 3 by 15:00. As the sun starts to set, the risk diminishing to 1 at 17:00 and finally dropping to 0 by 18:00, signaling a safer time for outdoor activities as the day winds down. Be mindful of the midday sun to protect your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 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 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences significant fluctuations throughout the year, with extreme exposure categories dominating the winter months from January to March and returning again in the fall from September to November. This indicates that these months, particularly January, February, and March, alongside September and November, are high-risk periods for UV exposure, with a consistent burn time of just 10 minutes. April also marks a transition into extreme levels with a slightly lower UV Index of 12. As summer approaches, UV levels drop but remain notable, with May through July categorized as very high and high, respectively. For visitors and residents, it is critical to take precautions during these high-risk months by wearing protective clothing, applying sunscreen, and minimizing sun exposure during peak hours, even in months with lower index readings. Staying informed and protected will ensure safety while enjoying outdoor activities.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grande Riviere Noire | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 12 | 14 | 14 |
| Quatre Bornes UVI | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 13 | 14 | 15 |
| Curepipe UVI | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 13 | 14 | 15 |
| Vacoas UVI | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 13 | 14 | 15 |
| Beau Bassin-Rose Hill UVI | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 13 | 14 | 15 |
| Port Louis UVI | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 13 | 14 | 15 |