The UV index in the southern hemisphere goes a lot higher than anything you experience up in the northern hemisphere. Do yourself a favour and go have look at the UV index on a hot summers day in Sydney in January.

For example today in sw Australia in late winter/spring it's a uv index of 5.

Summer time it sits at 13+ at noon on a clear day.

https://www.bom.gov.au/climate/maps/averages/uv-index/?perio...