UV Index in St Martin, Guernsey

Last updated: July 2, 2025

Understanding the UV Index in St Martin, Guernsey is crucial for protecting your skin and overall health. With UV levels fluctuating throughout the day, awareness can help you prevent sunburn and long-term skin damage caused by harmful radiation. St Martin's temperate climate offers comfortable conditions, but it also presents certain risks, especially during midday when the UV Index peaks at 8—indicating a high potential for harm. By staying informed about UV levels, you can enjoy the sun safely while taking necessary precautions to safeguard your skin health.

Hourly UV Index in St Martin

As the sun rises, the UV Index begins its ascent, starting at a gentle 1 at 07:00. By 09:00, it gradually ramps up to 3, signaling the start of a moderately sunny day. The index peaks at 8 from 12:00 to 14:00, reminding everyone to take care as midday rays can be intense. Following this peak, the UV levels begin to decline sharply, dropping to 7 at 15:00 and further to 4 by 17:00. As the sun sets, the UV Index falls back to 2 at 18:00 and settles at 1 by 19:00, marking the end of the day’s solar intensity. Stay sun-safe and enjoy the rays while they last!

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	2	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	8	very high	15 min
13:00	8	very high	15 min
14:00	8	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in St Martin

Throughout the year, the UV Index fluctuates significantly, impacting the risk of skin damage from sun exposure. High-risk months for UV exposure include April through August, with the index peaking at a very high level of 9 in June. During these months, the recommended burn time decreases to as low as 15 minutes, necessitating caution. In contrast, January, November, and December experience lower UV levels, categorized as low with burn times of up to 45 minutes. Visitors and residents are advised to take protective measures during high UV periods by wearing sunscreen, protective clothing, and sunglasses, especially in the peak summer months. Stay informed and proactive to minimize the risk of sunburn and long-term skin damage.

Monthly Maximum UV Index for St Martin, Guernsey

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in St Martin. 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 St Martin, 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 St Martin UV Index with Other Guernsey Cities

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

St Martin's solar exposure compared to other cities in Guernsey. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
St Martin	2	3	4	6	7	9	8	7	6	4	2	1
St Anne UVI	2	3	4	6	7	9	8	7	6	4	2	1
Sark UVI	2	3	4	6	7	9	8	7	6	4	2	1
Saint Peter Port UVI	2	3	4	6	7	9	8	7	6	4	2	1
Saint Saviour UVI	2	3	4	6	7	9	8	7	6	4	2	1