Babies and the UV index: what's actually safe

The Australian rule for babies is blunt and worth memorising: under 12 months, out of direct sun whenever the UV index is 3 or above. Baby skin is thinner, burns faster, and severe sunburn in infancy does lasting harm, but 'out of direct sun' is not 'never outside'. Here's how Cancer Council's guidance works in practice.

Why babies are different

Infant skin is significantly thinner than adult skin, with less melanin even in babies who will grow up dark-skinned, and it burns at doses adults barely notice. Babies also can't move themselves out of the sun, sweat less effectively, and a sunburnt baby risks dehydration and heat illness on top of the skin damage. Childhood sunburn is strongly linked to lifetime melanoma risk, protection now is genuinely protective for decades.

The practical order of protection

• Timing first. Plan outside time for when UV is below 3, early morning and late afternoon in summer, more of the day in a southern winter. The live UV for your city makes this a one-glance check.
• Shade second. Trees, shade sails, a proper pram canopy. Note that shade halves UV rather than eliminating it, reflected UV from paths, sand and water still arrives sideways.
• Cover what's left. Loose, densely woven clothing, a broad-brimmed or legionnaire hat (the strap-chinned bucket hat is the national uniform for a reason), and a rashie for water play.
• Sunscreen last, from 6 months. Cancer Council advises sunscreen on small exposed areas, face, backs of hands, feet, for babies over 6 months, tested first on a patch of skin. Under 6 months, rely on timing, shade and clothing instead.

Pram and car-seat traps

Two well-meaning mistakes to skip. Draping a wrap or muslin over the pram blocks airflow and can dangerously overheat the pram on a warm day, use the canopy or a purpose-made mesh cover instead. And remember car side windows pass UVA: on long daytime drives, a window shade on the baby's side is worthwhile.

Vitamin D, briefly

Parents are sometimes told babies 'need sun' for vitamin D. Australian guidance is the opposite for under-1s: their vitamin D comes via maternal stores, feeding and drops if a doctor advises, not deliberate sun exposure. Incidental light during low-UV outings is plenty; ask your child health nurse or GP if you're unsure.

Frequently asked questions

Can I put sunscreen on a 3-month-old?

Australian guidance says avoid it under 6 months, young skin absorbs more and reacts more. Use timing, shade and clothing instead. From 6 months, use a sensitive-skin SPF 50+ on small exposed areas, patch-tested first.

What UV index is safe for a baby?

Below 3, normal outside time is fine, it's the level where Australian authorities say no protection is needed for most people. At 3 or above, keep babies under 12 months out of direct sun: shade, canopy, clothing and timing do the work.

What if my baby got sunburnt?

For any sunburn on a baby under 12 months, or blistering at any age, see a doctor, Healthdirect advises medical review for infant sunburn. Cool (not icy) compresses and extra feeds help while you seek advice.

Keep reading

• The five S's of sun safety
• Live UV by city
• Does UV go through clothes?
• Sunburn on cloudy days