Take a look at the short infographic, that shows whether public wifi is safe or not. Also, read the article “All you need to know about Wifi security.”
Summarizing the infographic, to stay safe when using public Wifi you should use a virtual private network. If you are Mac user, try VPN Client. It provides a Free 7-days trial subscription plan.
* More infographics on Pinterest – https://www.pinterest.com/nektony/vpn-client/