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UV Index in Gustavia, BL

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Today's UV index in Gustavia, Saint Barthélemy Saint Barthélemy will be up to 7.8, indicating high risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.


Today's tips

With Gustavia's UV index reaching 7.8, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours between 10 a.m. and 4 p.m., when UV rays are strongest.

Gustavia Weather

Read more here about the climate and sun exposure in and around Gustavia.

UV Index in Gustavia

The UV index in Gustavia, Saint Barthélemy, can reach high levels throughout the year. During the summer months (June-August), when the sun is at its strongest, the UV index can often exceed 10 (very high), which means intense sun exposure. It is important to protect your skin by wearing sunscreen, hats, and sunglasses, and seeking shade during peak hours.

Weather Seasons

UV index

Gustavia experiences a tropical climate, with two main seasons: the dry season and the wet season. The dry season lasts from December to May, characterized by warm and dry weather. Average temperatures range from 25 °C to 30 °C (77 °F to 86 °F) during this period. The wet season, from June to November, brings more rain and occasional tropical storms. Despite the rain, temperatures remain fairly consistent.

Gustavia's Climate

Compared to other destinations in the region, Gustavia receives a significant amount of sun exposure. Its location in the Caribbean means it enjoys a tropical climate with plenty of sunshine year-round. However, due to its small size and the presence of surrounding islands, Gustavia may experience slightly lower temperatures and milder conditions compared to other Caribbean destinations. Nevertheless, it is still important to be mindful of the strong sun and take appropriate precautions.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Gustavia. It's designed to provide you with a better understanding of the yearly weather and sun exposure.


* This page's content about the UV index in Gustavia (Saint Barthélemy) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.