UV Index in Wattala, Sri Lanka

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Wattala, Sri Lanka, where the tropical climate intensifies sun exposure risks. With UV levels peaking at 12 around midday, awareness is essential for preventing sunburn and promoting long-term skin health. By keeping an eye on these levels, you can better protect yourself from harmful UV radiation, especially during the hottest hours of the day. In Wattala's warm climate, knowing when to seek shade or apply sunscreen can make all the difference in enjoying the beautiful outdoor surroundings safely.

Hourly UV Index in Wattala

The UV Index data reveals a dynamic progression throughout the day, with the sun's intensity gradually rising from a modest 2 at 07:00 to a peak of 12 during both 11:00 and 12:00. This indicates a high risk for sun exposure, making it crucial to take protective measures. As the afternoon rolls in, the index declines, gently tapering off to 8 by 14:00, before plummeting to a mere 1 at 17:00 and hitting 0 by 19:00. Thus, for sun lovers and outdoor enthusiasts, the midday hours (10:00-14:00) are the golden time to enjoy the outdoors, while the diminishing levels later offer a safer reprieve. Remember to stay safe under the sun!

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	2	low	45 min
08:00	4	moderate	30 min
09:00	7	high	25 min
10:00	10	very high	15 min
11:00	12	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 min
14:00	8	very high	15 min
15:00	4	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Wattala

The UV Index shows a consistently high level of solar radiation throughout the year, with the most intense months being March (Index 15) and April and September (Index 14), all categorized as extreme exposure, where even brief sun exposure can lead to burns in as little as 10 minutes. While January to July and September to November also maintain an extreme level, December has a slightly lower risk with an Index of 10, categorized as very high, allowing for a 15-minute burn time. Visitors and residents should take precautionary measures, particularly from March through October, by wearing sunscreen, protective clothing, and seeking shade to minimize the risk of harmful UV exposure.

Monthly Maximum UV Index for Wattala, Sri Lanka

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

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

Wattala's solar exposure compared to other cities in Sri Lanka. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Jaffna UVI	11	13	14	15	13	12	13	13	14	12	11	10
Moratuwa UVI	11	13	14	15	14	12	13	14	14	13	11	10
Maharagama UVI	11	13	14	15	14	12	13	14	14	13	11	10
Wattala	12	13	15	14	14	13	12	13	14	13	11	10
Dehiwala-Mount Lavinia UVI	12	13	14	15	14	12	13	14	14	13	11	10
Colombo UVI	12	14	14	15	14	13	13	13	14	13	11	10