Last updated: July 2, 2025
Awareness of the UV Index is crucial for residents and visitors in Walvis Bay, Namibia, where the BWk climate brings an array of sun exposure risks. Understanding UV levels is vital for protecting yourself against sunburn and promoting long-term skin health. With peak UV Index readings reaching 6 around midday, it’s essential to approach sun safety with vigilance. As you enjoy Walvis Bay’s stunning landscapes and vibrant activities, stay informed about the UV Index to ensure a safe and enjoyable experience under the Namibian sun.
The UV Index readings for the day reveal a gradual increase in solar intensity as the morning progresses. Starting with a maximum of 0 at 7:00 AM, the index slowly climbs to 6 by noon, indicating a peak in potential sun exposure. From 12:00 PM to 2:00 PM, the index remains steady at 6, suggesting that sun protection is crucial during these hours. As the afternoon unfolds, the index begins to decline, dropping back to 4 by 3:00 PM and gradually tapering off to 1 by 5:00 PM, ultimately returning to 0 by 7:00 PM. It's clear: the midday hours are when the sun's rays are most intense, making it essential to take precautions if spending time outdoors.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 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 |
Throughout the year, the UV Index shows significant seasonal variations, particularly peaking in the winter months. From January to March, the UV Index remains at an extreme level of 14, with a burn time of just 10 minutes, posing a high risk for sunburn. This trend continues into April with a slightly lower UV Index of 11 but still categorized as extreme. The risk begins to taper off from May to July, where the index reaches a maximum of 8 (very high) before settling back to 6 (high) in the summer months of June and July, allowing for 25 minutes of burn time. However, the UV risk escalates again from September to November, with values going back to extreme levels (11 to 14) and a burn time of 10 minutes. Visitors and residents are advised to take precautions during the high-risk months from January to April, as well as in September and November. It is crucial to wear protective clothing, apply sunscreen, and limit sun exposure during peak hours to safeguard against harmful UV rays.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Walvis Bay | 14 | 14 | 12 | 11 | 8 | 6 | 6 | 8 | 11 | 12 | 13 | 14 |
| Swakopmund UVI | 14 | 14 | 12 | 11 | 8 | 6 | 6 | 8 | 11 | 12 | 13 | 14 |
| Windhoek UVI | 16 | 17 | 14 | 12 | 9 | 7 | 7 | 10 | 12 | 14 | 15 | 16 |
| Rundu UVI | 17 | 17 | 15 | 13 | 10 | 8 | 8 | 10 | 12 | 12 | 15 | 15 |
| Oshakati UVI | 17 | 17 | 16 | 13 | 10 | 9 | 9 | 11 | 13 | 14 | 15 | 16 |