UV Index in Cruz Bay, Virgin Islands (U.S.)

Last updated: August 1, 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.

Hourly UV Index in Cruz Bay

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!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
TimeUVICategoryTime to Burn
07:001low45 min
08:003moderate30 min
09:005moderate30 min
10:009very high15 min
11:0012extreme10 min
12:0013extreme10 min
13:0012extreme10 min
14:0010very high15 min
15:007high25 min
16:004moderate30 min
17:002low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in Cruz Bay

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.

Monthly Maximum UV Index for Cruz Bay, Virgin Islands (U.S.)

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Cruz Bay. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec911131313131313141298
Data source: Statistical UV Index data for Cruz Bay, based on information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Compare Cruz Bay UV Index with Other Virgin Islands (U.S.) Cities

The table above highlights how UV exposure in Cruz Bay compares to other major locations across Virgin Islands (U.S.). This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Cruz Bay's solar exposure compared to other cities in Virgin Islands (U.S.). Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Charlotte Amalie UVI911131313131213141298
Cruz Bay911131313131313141298
Saint Croix UVI9111313131313131412109