Does Rottnest Island need sun protection in winter?

Not every day. Midwinter middays in Rottnest Island often sit below UV 3, but clear late-winter days (from August in much of Western Australia) cross the threshold before the weather feels like spring. Check the live index.

Does the water make UV worse in Rottnest Island?

It can. Sand and water reflect ultraviolet, so skin that is not covered — including under the chin and on the tops of feet — picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.

UV index in Rottnest Island today

Q: When does Rottnest Island need sun protection?

Whenever the UV index is 3 or above. In Rottnest Island that is typically from September through April, and any other day UV reaches 3. SunSmart and ARPANSA use the same rule Australia-wide.

At 32.0°S, Rottnest Island is surrounded by reflective water. Typical summer peaks of 10–12 (very high to extreme) plus sea glare make this a full-cover, full-sunscreen place. This is warm-temperate Australia: a long protection season from early spring through autumn, with the odd clear winter midday that still burns.

Live reading · data by Open-Meteo · reference monitoring by ARPANSA

Today and tomorrow in Rottnest Island

Peak UV, temperature and conditions for Rottnest Island. Tomorrow’s peak is the number to plan around if you’re heading out in the middle of the day.

Weather conditions right now

Cloud and rain cut heat more than they cut UV. A partly cloudy island day in Rottnest Island can still sit at protection levels. Why you burn on cloudy days.

When Rottnest Island needs sun protection

Sun protection is needed in Rottnest Island typically from September through April, and any other day UV reaches 3. With water on more than one side, reflection is the default, not a beach-only problem.

The threshold, per SunSmart and ARPANSA: whenever UV reaches 3 or above, Slip on covering clothing, Slop on SPF 50+ sunscreen, Slap on a hat, Seek shade and Slide on sunglasses. Read the full sun safety guide.

The UV scale at a glance

0–2Low
3–5Moderate
6–7High
8–10Very high
11+Extreme

Local support in Western Australia

Cancer Council WA: West Australian sun-safety campaigns and SunSmart schools.

Frequently asked questions

When does Rottnest Island need sun protection?: Whenever the UV index is 3 or above. In Rottnest Island that is typically from September through April, and any other day UV reaches 3. SunSmart and ARPANSA use the same rule Australia-wide.
Does Rottnest Island need sun protection in winter?: Not every day. Midwinter middays in Rottnest Island often sit below UV 3, but clear late-winter days (from August in much of Western Australia) cross the threshold before the weather feels like spring. Check the live index.
Does the water make UV worse in Rottnest Island?: It can. Sand and water reflect ultraviolet, so skin that is not covered — including under the chin and on the tops of feet — picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.