Last updated: October 4, 2025
In Cruz Bay, Virgin Islands (U.S.), understanding the UV Index is crucial for ensuring your skin's health and preventing sunburn. With the tropical climate here, where sun exposure peaks dramatically during the day, being aware of UV levels can help you make informed decisions about outdoor activities. As illustrated by today’s UV Index, which soars to a maximum of 13 at noon, it’s vital to protect yourself against harmful rays, especially during those peak hours. Taking simple precautions can safeguard your skin and enhance your enjoyment of Cruz Bay's stunning beaches and vibrant surroundings.
The UV Index rises sharply throughout the morning, peaking at 1 at 07:00 and soaring to its highest point of 13 by 12:00. From 08:00 to 11:00, the index climbs steadily, reaching 11 at 11:00, indicating a significant risk of harm from unprotected sun exposure. As we transition into the afternoon, the index begins to decline; it drops to 10 by 14:00 and continues to taper off, falling to 4 by 16:00. By evening, the UV Index settles down to a safe level of 1 at 18:00 and finally drops to 0 by 19:00, signaling the end of the day when sun protection is no longer a concern. Remember to take precautions during peak hours, especially between 10:00 and 14:00, when the sun's intensity is at its highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | 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 |
Throughout the year, UV index values exhibit notable variability, with high-risk months predominantly occurring from February to October, where the index reaches extremes ranging from 11 to 14. The most intense periods are seen in September with a UV index of 14, alongside March, April, May, June, July, and August, all maintaining high levels of 13. During these months, burn times are reduced to just 10 minutes, emphasizing the need for vigilance in sun protection. Conversely, January, November, and December see a slight decline in risk, with UV indexes of 9 and 8, allowing for burn times of 15 minutes. Visitors and residents are strongly advised to utilize appropriate sun protection strategies, including the use of sunscreen, protective clothing, and seeking shade during peak UV hours to mitigate risks throughout the year.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Charlotte Amalie UVI | 9 | 11 | 13 | 13 | 13 | 13 | 12 | 13 | 14 | 12 | 9 | 8 |
| Cruz Bay | 9 | 11 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 9 | 8 |
| Saint Croix UVI | 9 | 11 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 10 | 9 |