UV Index in Castries, Saint Lucia

Last updated: May 3, 2025

Understanding the UV Index in Castries, Saint Lucia is crucial for safeguarding your skin health against harmful ultraviolet radiation. As a tropical paradise, Castries experiences intense sun exposure, particularly during the midday hours when UV levels peak significantly. With a maximum UV Index soaring to 14 around noon, it's essential to recognize the risks of sunburn and long-term skin damage. Staying informed about the UV Index helps you take proactive measures to protect yourself, ensuring a safe and enjoyable experience in this beautiful coastal climate.

Hourly UV Index in Castries

The UV Index today paints a vivid picture of a sunny day's intensity. Starting off at a moderate level of 1 at 7:00 AM, the sun rises steadily, peaking at 14 around 12:00 PM—a high risk time for unprotected skin. Expect the index to hit its zenith at 1:00 PM with a dramatic 13, only to gently recede as the afternoon fades, dropping to 6 by 3:00 PM. As the sun begins to set, the levels decrease further, retreating to 1 by 5:00 PM and finally to a 0 by 7:00 PM, signaling a safe window for late evening activities. Remember to protect your skin during those peak hours!

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
09:007high25 min
10:0010very high15 min
11:0013extreme10 min
12:0014extreme10 min
13:0012extreme10 min
14:009very high15 min
15:006high25 min
16:003moderate30 min
17:001low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in Castries

The UV Index experiences significant seasonal fluctuations, with extreme levels persisting from February through October, peaking in the summer months of March, April, May, August, and September at a UV Index of 14. Visitors and residents should pay particular attention to the high-risk months of February to October, where the potential for skin damage is elevated, and burn times can be as little as 10 minutes. In contrast, January, November, and December see lower UV levels, classified as very high, with slightly longer burn times of 15 minutes. To minimize risks, it is strongly advised to utilize sun protection measures, such as sunscreen, protective clothing, and seeking shade, particularly during peak hours when UV exposure is highest.

Monthly Maximum UV Index for Castries, Saint Lucia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Castries. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141313141412109
Data source: Statistical UV Index data for Castries, 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 Castries UV Index with Other Saint Lucia Cities

The table above highlights how UV exposure in Castries compares to other major locations across Saint Lucia. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Castries's solar exposure compared to other cities in Saint Lucia. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Castries10121414141313141412109
Dennery UVI10121414141313141412109
Soufriere UVI10121414141313141412109
Micoud UVI10121414141313141412109
Vieux Fort UVI10121414141313141412109