Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Biak, Indonesia, where the tropical climate brings about significant sun exposure throughout the year. Knowing the UV levels can empower individuals to take preventive measures against sunburn and long-term skin damage, ensuring better overall skin health. With peak UV Index readings reaching as high as 14 around midday, it's important to be vigilant, especially given Biak's Af climate, which typically experiences intense sunlight. By staying informed about UV risks, you can enjoy the beautiful outdoors safely while protecting your skin from harmful effects.
The UV Index starts off the day at a low value of 1 at 07:00, making it a safe time for outdoor activities. As the sun rises higher, the index climbs steadily, reaching a moderate 3 by 08:00 and escalating to a high 10 by 10:00. The peak intensity occurs at 12:00, where it soars to a dangerous 14, urging caution for sun exposure. After this point, the UV levels gradually decline, dropping to 12 by 13:00, and continuing to fall through the afternoon to 5 at 15:00 and down to a low 1 by 17:00. By the evening hours, the UV Index falls to 0, signaling a safe return for outdoor activities without sun protection. Stay informed and protective during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 5 | 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 |
Throughout the year, UV Index values remain consistently high, indicating extreme exposure categories with a burn time of just 10 minutes across all months. The highest UV Index readings occur from February to April, peaking at 17, making these months the highest risk for sunburn and skin damage. While the index slightly decreases in the summer months of June and July, it still remains at 12, indicating a need for precaution. As the year progresses into the fall and winter, values gradually lower but remain in the 14 to 15 range. Visitors and residents are advised to take protective measures year-round, including wearing sunscreen, protective clothing, and sunglasses, especially during the high-risk months of February through April. Staying informed about UV levels can help mitigate the risk of harm from sun exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surabaya UVI | 13 | 15 | 14 | 12 | 12 | 10 | 11 | 12 | 14 | 13 | 13 | 13 |
| Bekasi UVI | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
| Jakarta UVI | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
| Medan UVI | 13 | 15 | 15 | 15 | 14 | 12 | 12 | 13 | 14 | 14 | 13 | 12 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |
| Biak | 15 | 16 | 17 | 17 | 14 | 12 | 12 | 14 | 15 | 15 | 14 | 13 |