Last updated: July 2, 2025
In Belfast, South Africa, staying aware of the UV Index is essential for protecting your skin and overall health. Understanding UV levels helps you prevent sunburn and long-term skin damage, ensuring enjoyable outdoor activities without the risks. With a Cwb climate, Belfast experiences fluctuating UV exposure throughout the day, peaking at a concerning level of 7 around noon. By being informed about these levels, you can take proactive steps to safeguard your skin—enjoy the sun while keeping your health in check!
The UV index for the day shows a gradual increase in intensity, peaking at 12:00 PM with a notably high value of 7. Starting the morning with a mild index of 1 at 07:00 AM and 08:00 AM, the UV levels began to rise significantly by 09:00 AM, reaching 3. It escalated further to 4 by 10:00 AM, and by 11:00 AM, the index hit 6, indicating a need for sun protection. The most intense UV exposure occurs at 12:00 PM, where the index reaches its maximum at 7 before starting to decline in the afternoon. Post 1:00 PM, the values dropped to 6, then fell to 4 at 02:00 PM, and continued retreating to 3 by 03:00 PM. As the sun sets, the UV index returns to 1 by 04:00 PM and winds down to 0 in the evening hours, from 06:00 PM onwards. Stay safe and enjoy the sunshine, but remember to take precautions during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV exposure varies significantly, with high-risk months occurring predominantly between January and April, where the UV Index reaches extreme levels of 16 or 13 and a very high rating of 10 in April, requiring just 10 minutes of sun exposure to cause burns. The summer months see a slight decline in UV intensity, with June and July having a high UV Index of 6 and 7, which increases again to very high levels in August (9) before returning to extreme levels in September (11) and October (13). November also remains high at 14. Visitors and residents are advised to take precautionary measures during these peak months, such as wearing protective clothing, using sunscreen, and limiting exposure during peak sunlight hours to safeguard against harmful UV radiation.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cape Town UVI | 14 | 13 | 11 | 8 | 5 | 3 | 4 | 6 | 9 | 11 | 12 | 14 |
| Durban UVI | 14 | 13 | 12 | 9 | 6 | 4 | 5 | 7 | 9 | 11 | 13 | 15 |
| Johannesburg UVI | 15 | 15 | 13 | 10 | 7 | 6 | 6 | 8 | 11 | 12 | 14 | 16 |
| Pretoria UVI | 16 | 15 | 13 | 10 | 7 | 6 | 6 | 9 | 11 | 13 | 14 | 16 |
| Soweto UVI | 16 | 15 | 13 | 11 | 7 | 6 | 6 | 8 | 11 | 13 | 15 | 16 |
| Belfast | 16 | 16 | 13 | 10 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 16 |