Best UV Index for Tanning
The safest tanning happens at UV index 3–5. Above UV 6, most skin burns before it tans. Here is exactly how long each skin type can stay out.
Quick answer
Safe tanning time by skin type (minutes, no sunscreen)
About two-thirds of the time to first burn — stop before skin turns pink.
| Skin type | UV 3 | UV 5 | UV 7 | UV 9 | UV 11 |
|---|---|---|---|---|---|
| Type I — very fair, always burns | 15 | 9 | 6 | 5 | 4 |
| Type II — fair, usually burns | 22 | 13 | 9 | 7 | 6 |
| Type III — medium, sometimes burns | 44 | 26 | 19 | 15 | 12 |
| Type IV — olive, rarely burns | 66 | 40 | 28 | 22 | 18 |
| Type V — brown, very rarely burns | 88 | 53 | 38 | 29 | 24 |
| Type VI — dark, never burns | 110 | 66 | 47 | 37 | 30 |
Very fair skin? Read our Fitzpatrick skin type guides.
How to tan without burning
- Check today's hourly UV for your city and pick a window at UV 3–5.
- Start with 10–15 minutes and build up over several days.
- Use SPF 30 — you still tan, just more slowly and safely.
- Remember water, sand and snow reflect UV and shorten safe time.
- Stop at the first sign of pinkness; burns show fully hours later.
Check live UV before you go out
Tanning and UV — FAQs
What UV index is best for tanning?
UV 3 to 5 gives a gradual tan with the lowest burn risk. Above UV 6, skin burns faster than it tans for skin types I–III, so sessions must be very short.
Can you tan at UV index 1 or 2?
Very little. UVB at UV 1–2 is too weak to trigger meaningful melanin production, though UVA still ages skin.
Is UV 8 too high to tan?
For fair skin, yes — type I and II skin can burn in 10–15 minutes at UV 8. Darker skin types can tolerate short exposure with SPF 30+.
Does sunscreen stop you tanning?
No. SPF 30 slows UVB but you still tan gradually, with far less burn and DNA damage.
What time of day is best for tanning?
Before 10am or after 4pm, when UV is typically 3–5. Check the hourly UV forecast for your city to find the window.