Quick answer
Safe sun time depends on the UV index and your Fitzpatrick skin type. At UV 11+ (Extreme — typical of an Australian summer noon), Fitzpatrick Type I–II skin can burn in under 15 minutes unprotected. SunSmart's rule: protect skin whenever the UV index is 3 or above.
TL;DR: Key Takeaways
- UV 0–2 Low · 3–5 Moderate · 6–7 High · 8–10 Very High · 11+ Extreme.
- SunSmart rule: protection needed whenever UV is 3 or above.
- Australian summer UV regularly reaches 11–14 (Extreme).
- Fitzpatrick Type I–II burns in under 15 min at UV 11+.
- ARPANSA + BOM publish live UV; SunSmart app sends alerts.
What the UV index actually measures (ARPANSA)
The UV index is a unitless scale measuring the strength of sunburning UV radiation reaching the ground. It runs 0 (night) to 11+ (Extreme). ARPANSA — the Australian Radiation Protection and Nuclear Safety Agency — operates Australia's UV monitoring network and publishes real-time readings at every state capital.
For the deeper UV science, read what the UV index actually measures and UV burn time explained.
Fitzpatrick skin types explained
- Type I — very fair; always burns, never tans.
- Type II — fair; usually burns, tans poorly.
- Type III — light olive; sometimes burns, tans gradually.
- Type IV — olive; rarely burns, tans easily.
- Type V — brown; very rarely burns, deeply pigments.
- Type VI — deeply pigmented; almost never burns.
Most fair-skinned Aussies sit in Type I–III. See our full Fitzpatrick scale guide.
Safe sun time chart by UV and skin type
- UV 3–5 (Moderate) — Type I/II burns in ~30–45 min unprotected; Type V/VI in 90+ min.
- UV 6–7 (High) — Type I/II burns in ~20–30 min; protection essential.
- UV 8–10 (Very High) — Type I/II burns in 15–20 min.
- UV 11+ (Extreme) — Type I/II burns in under 15 min; avoid 10am–3pm.
These are baseline estimates for unprotected skin in clear conditions. Snow, water, sand and altitude all increase effective UV.
SunSmart: Slip, Slop, Slap, Seek, Slide
- Slip on a long-sleeved shirt
- Slop on SPF 50+ broad-spectrum sunscreen
- Slap on a broad-brimmed hat
- Seek shade — particularly between 10am and 3pm
- Slide on wraparound UV400 sunnies
Want a personalised safe-sun estimate?
Enter today's UV and your Fitzpatrick skin type — get a personalised minutes-outdoors estimate in your browser. Free.
Free safe-sun calculator
Our free safe-sun exposure calculator combines live UV data with your Fitzpatrick skin type to estimate burn time. It's a wellbeing aid for everyday decisions, not a clinical guarantee. Pair it with monthly skin self-checks.
Noticed a mole or spot that changed after a summer of sun? Screen it in seconds with our free skin cancer check for Australia — no app, no signup.
"In an Australian summer, the difference between safe and burnt is often a single hour outside at lunchtime."
Frequently asked questions
Frequently Asked Questions
ARPANSA publishes live UV index data at arpansa.gov.au, and the Bureau of Meteorology shows daily forecasts. The free SunSmart app overlays both on your location and sends sun-protection alerts.
SunSmart's rule is simple: protect skin whenever the UV index is 3 or above. Below 3, brief unprotected exposure is generally safe for vitamin D — but not for fair skin in summer.
Fitzpatrick I burns always, never tans (very fair). Type II usually burns, tans poorly. Type III sometimes burns, tans gradually. Type IV rarely burns, tans easily. Types V–VI rarely burn, deeply pigmented. Fair-skinned Aussies skew I–III.
It depends on UV index and skin type. At UV 11+ (Extreme), unprotected fair skin (Type I/II) burns in under 15 minutes. Use our safe-sun calculator below for a personalised estimate.
Sunscreen reduces burn risk but doesn't eliminate it. SunSmart recommends combining SPF 50+ broad-spectrum sunscreen with clothing, hat, shade and sunglasses whenever UV is 3 or above.