Ultraviolet radiation

Exposure to ultraviolet (UV) radiation from the sun and other sources, such as solariums, is the major cause of skin cancer.

Australia has some of the highest levels of UV radiation in the world: in fact UV radiation is strong enough to cause sunburn in as little as 15 minutes on a fine January day.

Your skin remembers and records all the UV exposure you have ever received – all the sunburns, tans, solarium visits or just simple day-to-day time spent outdoors when you have not used sun protection. It all adds up and increases your long-term risk of skin cancer.

It's estimated that if we reduce our lifetime exposure to UV radiation by just 20%, Australia would have about one third fewer cases of skin cancer.

UV radiation from the sun is one of the best sources for vitamin D so a balance is important. Vitamin D helps to develop and maintain healthy bones and muscles. There are times when it is safe to take off your sun protection and get some sun for vitamin D.

Understanding UV radiation

UV radiation can damage our skin without us knowing. What is UV?

Factors affecting levels of UV radiation

Why do UV radiation levels vary throughout the day, each day of the year, across Australia?

Health risks

The sun's UV radiation is the major cause of skin cancer and also the best source of vitamin D. Too much exposure to UV radiation can cause sunburn, skin damage and skin cancer. Too little UV exposure can lead to vitamin D deficiency.

SunSmart UV Alert

The SunSmart UV Alert is issued whenever UV index levels are forecast to reach 3 and above. At this level UV radiation is strong enough to damage skin.

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