UV Index in Koolbaai, Sint Maarten

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Koolbaai, Sint Maarten, where the tropical climate brings not only sunshine but also significant UV exposure risks. With values peaking between 12:00 PM and 1:00 PM, reaching as high as 13, awareness of UV levels can help mitigate the dangers of sunburn and long-term skin damage. By staying informed about the UV Index, you can protect your skin, enjoy outdoor activities safely, and fully embrace the beautiful weather that Koolbaai has to offer.

Hourly UV Index in Koolbaai

The UV Index showcases a dynamic increase throughout the day, peaking at 13 around 12:00 PM. Starting from a gentle 1 at 7:00 AM, the index steadily climbs as the sun ascends, reaching 6 by 9:00 AM. The intensity becomes palpable by 11:00 AM with a sharp rise to 12, before hitting its zenith at 13 at noon, prompting caution for outdoor activities. As the afternoon unfolds, the levels begin to decline, dipping to 10 by 2:00 PM and gradually falling to 0 by 7:00 PM, signaling safer conditions for evening strolls. It’s essential to stay protected during the midday hours when the sun's rays are most intense!

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.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Koolbaai

As the seasons change, the UV Index exhibits notable fluctuations, with high-risk months typically from February to October, where values reach extreme levels of 11 to 14. In these months, the burn time is as brief as 10 minutes, necessitating increased caution. In January, November, and December, while the UV Index remains at a very high level of 9, individuals still face a burn time of 15 minutes, indicating a need for protection. To ensure safety, both visitors and residents should prioritize wearing sunscreen, protective clothing, and seeking shade regularly during these peak months, especially from midday to mid-afternoon when the sun's intensity is highest.

Monthly Maximum UV Index for Koolbaai, Sint Maarten

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Koolbaai. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Koolbaai, 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 Koolbaai UV Index with Other Sint Maarten Cities

The table above highlights how UV exposure in Koolbaai compares to other major locations across Sint Maarten. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Koolbaai's solar exposure compared to other cities in Sint Maarten. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Koolbaai	9	11	13	13	13	13	13	13	14	12	9	9
Simson Bay Village UVI	9	11	13	13	13	13	13	13	14	12	9	9
Philipsburg UVI	9	11	13	13	13	13	13	13	14	12	9	9
Lower Prince's Quarter UVI	9	11	13	13	13	13	13	13	14	12	9	9