UV Index in Portsmouth, Dominica

Last updated: July 2, 2025

In Portsmouth, Dominica, awareness of the UV Index is crucial for safeguarding your skin and overall health. With UV levels peaking at a blistering 14 around midday, understanding these indicators can help prevent sunburn and long-term skin damage. The sunny, tropical climate of Portsmouth brings not only beautiful days but also significant UV exposure risks, particularly during the late morning and early afternoon. By staying informed about the UV Index, you can enjoy the stunning beaches and outdoor activities while protecting yourself from the harmful effects of the sun.

Hourly UV Index in Portsmouth

The UV Index today showcases a dramatic rise in intensity as the sun reaches its zenith. Starting at a minimal 1 at 07:00, the index climbs steadily, peaking at an impressive 14 by 12:00, marking the day's highest point of sun exposure. From 11:00 to 13:00, when the UV Index registers between 12 and 13, it's crucial to protect your skin from potential damage. As the afternoon progresses, the index begins to dip, settling back to 10 at 14:00 and gradually declining to 1 by 17:00, making the evening safer for outdoor activities. With a final reading of 0 at 19:00, the day's sunlight wanes, urging caution for those venturing out during 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.
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	10	very high	15 min
11:00	12	extreme	10 min
12:00	14	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Portsmouth

The UV Index shows significant seasonal variations, with the most intense exposure occurring from February through October, where the index reaches levels categorized as extreme. During these months, particularly in March, April, May, July, and August, the UV Index peaks at 13 to 14, indicating a very short burn time of just 10 minutes. January, November, and December feature lower UV levels, classified as very high, with slightly longer burn times of 15 minutes. Visitors and residents should exercise caution during the high-risk months by seeking shade, wearing protective clothing, and applying sunscreen frequently to mitigate the risk of UV-related harm.

Monthly Maximum UV Index for Portsmouth, Dominica

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

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

Portsmouth's solar exposure compared to other cities in Dominica. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Marigot UVI	10	11	13	14	14	13	14	13	13	12	10	9
Portsmouth	10	11	13	14	14	13	14	13	13	12	10	9
Mahaut UVI	10	11	13	14	14	13	14	13	13	12	10	9
Roseau UVI	10	11	13	14	14	13	14	13	13	12	10	9
Berekua UVI	10	11	13	14	14	13	14	13	13	12	10	9