ARPANSA - Australian Radiation Protection and Nuclear Safety Agency

This page presents instantaneous recorded UV levels for Perth, Western Australia, adjusted for daylight saving if applicable. The UV data is collected continuously by a detector that responds to UV in a manner similar to human skin.

There is a self-refreshing version of this page that displays the graph only and is updated with the latest measured UV level every minute between 6AM and 8PM.

The orange line on the graph represents the modelled UV levels for a clear sky day and can be used as a guide to interpreting the graph. Ozone in the atmosphere varies on a daily basis and has an effect on UV levels. The model is based on an ozone value that is an average of historical daily ozone values for Perth. UV levels may occasionally exceed the model due to differences between the averaged and actual ozone levels, and due to local atmospheric conditions.

What the UV levels mean

The UV level can be related to ultraviolet radiation exposure as follows:

UV Level	Exposure Risk	Colour Code	Sun Protection Measures
2 or less	Low		You can safely stay outdoors with minimal protection.
3 to 5	Moderate		Wear sun protective clothing, a hat, sunscreen, sunglasses and seek shady areas.
6 to 7	High		As above.
8 to 10	Very High		As above.
11 or higher	Extreme		As above.

How to be sun aware

For further sun protection informaton refer to the ARPANSA UV Data Resource Page Top of Page